Sesquiterpene lactones as taxonomic characters in the asteraceae (original) (raw)

• Abbasov, R. M., N. M. Ismailov andK. S. Rybalko. 1965. The lactone constituents of_Artemisia spicigera_. The dynamics of accumulation of lactones, essential oils and “phenols” and their inter-relationships. Vopr. Eksperim. Botan. Sb. 5; Chem. Abstr.65: 12563c (1966).
  Google Scholar
• Abe, N., T. Harukawa, H. Ishikawa, T. Miki, M. Sumi andT. Toga. 1953. Santonin. I. The synthesis of two optically inactive stereoisomerides of santonin. J. Amer. Chem. Soc.75: 2567.
  CAS Google Scholar
• -,R. Onoda, K. Shirahata, T. Kato, M. C. Woods and Y. Kitahara. 1968. The structure of bakkenolide A. Tetrahedron Lett. 369.
• Abdel-Baset, Z. H., L. Southwick, W. Padolina, H. Yoshioka, T. J. Mabry andS. B. Jones, Jr. 1971. Sesquiterpene lactones: A survey of 21 United States taxa from the genus_Vernonia_ (Compositae). Phytochemistry10: 2201.
  CAS Google Scholar
• Abraham, E. P., D. M. Crowfoot, A. E. Joseph andE. M. Osborn. 1946. An antibacterial substance from_Arctium minus_ and_Onopordon tauricum_. Nature158: 744.
  CAS PubMed Google Scholar
• Abu-Shady, H. andT. O. Soine. 1953. The chemistry of_Ambrosia maritima_ L. The isolation and preliminary characterization of ambrosin and damsin. J. Amer. Pharm. Assoc.42: 387.
  Article CAS Google Scholar
• Adams, R. andW. Herz. 1949. Helenalin. I. Isolation and properties. J. Amer. Chem. Soc.71: 2546.
  CAS Google Scholar
• ——. 1949. Helenalin, III. Reduction and dehydrogenation. J. Amer. Chem. Soc.71: 2554.
  CAS Google Scholar
• Agafonova, N. V., L. E. Kushnir, A. D. Kuzovkov, A. I. Shreter andM. G. Pimenov. 1966. Chemical study of_Saussurea pulchella_ Fisch. Aptechn. Delo.15: 36; Chem. Abstr.65: 3681d (1966).
  PubMed CAS Google Scholar
• Akyev, B. 1976. Artemin from_Artemisia kemrudica_. Isv. Akad. Nauk. Turkmensk. SSR. Ser. Biol. Nauk.6: 85; Chem. Abstr.87: 19053n (1977).
  Google Scholar
• —,S. Z. Kasymov andG. P. Sidyakin. 1971. Sesquiterpene lactones of_Artemisia santolina_. Khim. Prir. Soedin.7: 531; English ed. p. 514; Chem. Abstr.75: 148501h (1971).
  CAS Google Scholar
• ———. 1972. Arsanin—a new sesquiterpene lactone from_Artemisia santolina_. Khim. Prir. Soedin.8: 461; English ed. p. 458; Chem. Abstr. 78: 13748K (1973).
  CAS Google Scholar
• ———. 1972. Structure and configuration of arsanin. Khim. Prir. Soedin.8: 730; English ed. p. 713; Chem. Abstr.78: 84565j (1973).
  Google Scholar
• ———. 1972. Artesin—a new sesquiterpene lactone from_Artemisia santolina_. Khim. Prir. Soedin.8: 733; English ed. p. 715; Chem. Abstr. 78: 84563g (1973).
  Google Scholar
• Akhmedov, I. S., S. Z. Kasymov andG. P. Sidyakin. 1970. Structure of artabin. Khim. Prir. Soedin.6: 691; English ed. p. 703; Chem. Abstr.74: 112239u (1971).
  CAS Google Scholar
• ———. 1970. Artabin—a new lactone from_Artemisia absinthium_. Khim. Prir. Soedin.6: 622; English ed. p. 634.
  CAS Google Scholar
• ———. 1972. Arabsin—a new lactone from_Artemisia absinthium_. Khim. Prir. Soedin.8: 245; English ed. p. 245; Chem. Abstr.77: 85567c (1972).
  Google Scholar
• Alemán, R., A. Rosado, M. Rodríguez andJ. F. Bertrán. 1977. Composition of_Wedelia rugosa_ Greenm. Rev. Cubana Farm.11: 47; Chem. Abstr.88: 3076g (1978).
  Google Scholar
• Ali, E., P. P. Ghosh Dastidar, S. C. Pakrashi, L. J. Durham andA. M. Duffield. 1972. Sesquiterpene lactones of_Enhydra fluctuans_ Lour. Structures of enhydrin, fluctuanin and fluctuadin. Tetrahedron28: 2285.
  CAS Google Scholar
• Alvarado, S., J. F. Ciccio, J. Calzada, V. Zabel andW. H. Watson. 1979. Thieleanine, a new guaianolide from_Decachaeta thieleana_. Phytochemistry18: 330.
  CAS Google Scholar
• Anderson, L. A. P., W. T. de Kock, K. G. R. Pachler andC. V. D. M. Brink. 1967. The structure of vermeerin. A sesquiterpenoid dilactone from_Geigeria africana_ Gries. Tetrahedron23: 4153.
  CAS Google Scholar
• ——,W. Nel, K. G. R. Pachler andG. Van Tonder. 1969. Gafrinin, a sesquiterpenoid lactone from_Geigeria africana_ Gries. I. Revised structure. Tetrahedron24: 1687.
  Google Scholar
• Anthonson, T. andS. Chantharasakul. 1971. Isolation of ent-16-kauren-19-oic-acid and ent-16-kauren-19-01 from_Abrotanella nivigena_. Acta Chem. Scand.25: 1925; Chem. Abstr.75: 137488h (1971).
  Google Scholar
• Aparecida, M., H. Cagnin, C. M. R. Gómes, O. R. Gottlieb, A. I. Marx, M. F. de Rocha, G. F. da Silva andJ. A. Temperini. 1977. Biochemical systematics: Methods and principles. Plant Syst. Evol. Suppl.1: 53.
  Google Scholar
• Arkhipova, L. I., S. Z. Kasymov andG. P. Sidyakin. 1970. Sesquiterpenoid lactones from_Artemisia halophila_. Khim. Prir. Soedin.6: 480; Chem. Abstr.74: 10349n (1971).
  CAS Google Scholar
• Asahina, Y. andT. Momose. 1937. Über das α-oxysantonin. Ber. Dtsch. Chm. Ges.70: 812.
  Google Scholar
• Asaka, Y., T. Kubota andA. B. Kulkarni. 1977. Studies on a bitter principle from_Vernonia anthelmintica_. Phytochemistry16: 1838; Chem. Abstr.88: 47467q (1978).
  CAS Google Scholar
• Asakawa, Y., N. Tokunaga, T. Takemoto, S. Hattori, M. Mizutani andC. Suire. 1980. Chemosystematics of bryophytes. IV. The distribution of terpenoids and aromatic compounds in Hepaticae and Anthocerotae. J. Hattori Bot. Lab.47: 153.
  CAS Google Scholar
• Asplund, R. O., M. McKee andP. Balasubramaniyan. 1972. Artevasin: A new sesquiterpene lactone from_Artemisia tridentata_. Phytochemistry11: 3542.
  CAS Google Scholar
• Babakhodzhaev, A., S. Z. Kasymov andG. P. Sidyakin. 1973. Xanthatin from_Xanthium spinosum_. Khim. Prir. Soedin.9: 559; Chem. Abstr.80: 45621w (1974).
  CAS Google Scholar
• Bacon, J. D., E. L. Urbatsch, L. H. Bragg, T. J. Mabry, P. Neuman andD. W. Jackson. 1978. The flavonoids of_Tetragonotheca_ (Compositae). Phytochemistry17: 1939.
  CAS Google Scholar
• Baker, P. M., C. C. Fortes, E. G. Fortes, G. Cazzinelli, B. Gilbert, J. N. C. Lópes, J. Pellegrino, T. C. B. Tomassini andW. Vichnewski. 1972. Chemoprophylactic agents in schistosomiasis: Eremanthin, costunolide, α-cyclocostunolide, and bisabolol. J. Pharm. Pharmacol.24: 853.
  PubMed CAS Google Scholar
• Banh-Nhu, C., E. Gacs-Baitz, L. Radics, J. Tamas, K. Ujszaszy andG. Verzar-Petri. 1979. Achillicin, the first proazulene from_Achillea millefolium_. Phytochemistry18: 331.
  Google Scholar
• Barton, D. H. R. and P. deMayo. 1957. The constitution of pyrethrosin. J. Chem. Soc. (London) 150.
• -,G. P. Moss and J. A. Whittle. 1968. Biosynthesis of santonin. J. Chem. Soc. C. 1813.
• -,and C. R. Navayanan. 1958. The constitution of lactucin. J. Chem. Soc. (London) 963.
• -,and J. T. Pinhey. 1960. The stereochemical correlation of artemisin and geigerin. Proc. Chem. Soc. 279.
• -,-and R. J. Wells. 1964. Synthetic studies on geigerin and its derivatives. J. Chem. Soc. (London) 2518.
• Barua, N. C., R. P. Sharma, K. P. Madhysudanan, G. Thyagarayan, W. Herz andR. Murani. 1979. The sesquiterpene lactones of_Tithonia diversifolia_: Stereochemistry of the tagitinins and related compounds. J. Organ. Chem. (USA)44: 1831.
  Google Scholar
• Barua, R. N., R. P. Sharma, G. Thyagarajan, W. Herz andS. V. Govindan. 1980. New melampolides and darutigenol from_Sigesbeckia orientalis_. Phytochemistry19: 323.
  CAS Google Scholar
• ————— andJ. F. Blount. 1980. Unusual germacranolides from_Inula eupatorioides_. J. Organ. Chem. (USA)45: 4838.
  Google Scholar
• Batterham, T. J., N. K. Hart andJ. A. Lamberton. 1966. Guaianolides from the wax of_Calocephalus brownii_ F. Muell. (Compositae). Austral. J. Chem.19: 143.
  CAS Google Scholar
• Beauhaire, J., J. L. Fourrey, M. Vuilhorgne and J. Y. Lallemand. 1980. Dimeric sesquiterpene lactones: Structure of absinthin. Tetrahedron Lett. 3191.
• Beetle, A. A. andA. Young. 1965. A third subspecies in the_Artemisia tridentata_ complex. Rhodora67: 405.
  CAS Google Scholar
• Begley, M. J., G. Pattenden, T. J. Mabry, M. Miyakado and H. Yoshioka. 1975. Constitution of peucephyllin, a new type of germacranolide from_Peucephyllum schottii_. Tetrahedron. Lett. 1105.
• Benesova, V. andV. Herout. 1961. Neutral substances from_Telekia speciosa_ (Schreb) Baumg. Collect. Czech. Chem. Comm.26: 2916.
  CAS Google Scholar
• —— andF. Sôrm. 1961. Structure of telekin and isotelekin new sesquiterpenic lactones from_Telekia speciosa_ (Schreb) Baumg. Collect. Czech. Chem. Comm.26: 1350.
  CAS Google Scholar
• ———. 1964. Isolation and structure of nobilin, a sesquiterpene lactone with a ten-membered ring. Collect. Czech. Chem. Comm.29: 3097.
  Google Scholar
• —,M. V. Nazarenko andL. V. Sleptsova. 1970. Sesquiterpenic γ-lactones from_Artemisia jacutica_. Khim. Prir. Soedin.5: 186; Chem. Abstr.72: 39763n (1970).
  Google Scholar
• -,Z. Samek, V. Herout and F. Sôrm. 1970. The structure of nobilin. Tetrahedron Lett. 5017.
• Bentley, R. K. T., G. S. C. Buchanan, T. G. Halsall and V. Thaller. 1970. Urospermal A and urospermal B, conformers of a germacranolide aldehyde from_Urospermum dalechampii_ F. W. Schmidt. Chem. Commun. 435.
• Bermejo Barrera, J., C. Betancov, J. L. Bretón-Funes andA. G. González. 1969. Lactonas sesquiterpénicas de la_Amberboa lippii_ D.C. Anales Real Soc. Esp. Fís. Quím.65: 285.
  CAS Google Scholar
• -,J. L. Breton-Funes and A. G. González. 1966. Terpenoids of the_Sonchus_. Part III. Sesquiterpene lactones of_S. Jacquini_ D.C,S. pinnatus Ait. and_S. radicatus_ Ait. J. Chem. Soc. (London) 1298.
• -,-,M. Fajardo and A. G. González. 1967. Terpenoids from the_Sonchus_. VI. Tuberiferine from_Sonchus tuberifer_ Svent. Tetrahedron Lett. 3475.
• -,-,A. G. González and A. Villar Del Fresno. 1968. Lactonas sesquiterpénicas de_Sonchus hierrensis_ (Pit) Svent. stat. nov. var.benehoavensis Svent. var nova. Anales Real Soc. Esp. Fís. Quím. 893.
• Betkouski, M., T. J. Mabry, I. F. Taylor andW. H. Watson. 1975. Glaucolide-D and -E, two new germacranolides from_Vernonia uniflora_ Sch.-Bip. (Compositae). Rev. Latinoamer. Quím.6: 191.
  CAS Google Scholar
• -,-,T. W. Adams, W. H. Watson and S. B. Jones, Jr. 1976. Glaucolide G, a new germacranolide sesquiterpene lactone from_Vernonia leiocarpa_ (Compositae). Rev. Latinoamer. Quím.111; Chem. Abstr.86: 13822v (1977).
• Bhacca, N. S., R. A. Wiley, N. H. Fischer and F. W. Wehrli. 1973. Carbon-13 and proton magnetic resonance study of the structure and conformation of a new germacranolide sesquiterpene dilactone. Chem. Commun. 614.
• Bhadane, N. R., R. G. Kelsey andF. Shafizadeh. 1975. Sesquiterpene lactones of_Artemisia tridentata_ ssp.vaseyana. Phytochemistry14: 2084.
  CAS Google Scholar
• — andF. Shafizadeh. 1975. Sesquiterpene lactones of sagebrush: The structure of artecanin. Phytochemistry14: 2651.
  CAS Google Scholar
• Biddulph, S. F. 1944. A revision of the genus_Gaillardia_. Res. Stud. State Coll. Wash.12: 195.
  Google Scholar
• Bierner, M. W. 1973. Sesquiterpene lactones and the systematics of_Helenium quadridentatum_ and_H. elegans_. Biochem. System.1: 95; Chem. Abstr.79: 102768c (1973).
  CAS Google Scholar
• Bjeldanes, L. F. andT. A. Geissman. 1971. Constituents of an F1 hybrid_Encelia farinosa_ x_Encelia californica_. Phytochemistry10: 1079.
  CAS Google Scholar
• Bloszyk, E., B. Drozdz, Z. Samek, J. Toman andM. Holub. 1975. Linifolin A and helenalin from_Helenium aromaticum_. Phytochemistry14: 1444.
  CAS Google Scholar
• Bohlmann, F. andW. R. Abraham. 1981. Aplotaxene epoxide from_Cirsium hypoleucum_. Phytochemistry20: 855.
  CAS Google Scholar
• — andR. Bohlmann. 1980. Three guaianolides from_Hypochoeris radicata_. Phytochemistry19: 2045.
  CAS Google Scholar
• —,G. Brindopke andR. C. Rastogi. 1978. A new type of germacranolide from_Vernonia_ species. Phytochemistry17: 475.
  CAS Google Scholar
• — andH. Czerson. 1978. A new glaucolide derivative from_Erlangea remifolia_. Phytochemistry17: 1190.
  CAS Google Scholar
• ——. 1978. Neue Guajanolid-derivate aus_Erlangea inyangana_ (N. E. Br.) B. L. Burtt. Phytochemistry17: 568.
  CAS Google Scholar
• —— andS. Schöneweiß. 1977. Neue Inhaltsstoffe aus_Inula viscosa_ Ait. Chem. Ber.110: 1330.
  CAS Google Scholar
• —,A. K. Dhar, J. Jakupovic, R. M. King andH. Robinson. 1981. Eudesmanolides from_Dimerostemma lippioides_. Phytochemistry20: 838.
  CAS Google Scholar
• —————. 1981. Two sesquiterpene lactones with an additional propiolactone ring from_Disynaphia halimifolia_. Phytochemistry20: 1077.
  CAS Google Scholar
• ——R. M. King andH. Robinson. 1981. A guaianolide from_Guevaria sodiroi_. Phytochemistry20: 1144.
  CAS Google Scholar
• —,L. N. Dutta, W. Knauf, H. Robinson andR. M. King. 1980. Neue Sesquiterpenlactone aus_Aster umbellatus_. Phytochemistry19: 433.
  CAS Google Scholar
• ——. 1979. Neue Germacranolide aus_Liatris cylindracea_. Phytochemistry18: 847.
  CAS Google Scholar
• ——. 1979. Ein neues Heliangolid aus_Helianthus lehmannii_. Phytochemistry18: 679.
  Google Scholar
• ——,W. Dorner, R. M. King andH. Robinson. 1979. Zwei neue Guajanolide sowie Weitere Longipinenester aus Stevia-arten. Phytochemistry18: 673.
  CAS Google Scholar
• —— andK. Kerr. 1980. Sesquiterpenlactone aus_Oxylobus oaxacanus_. Phytochemistry19: 691.
  CAS Google Scholar
• ——,H. Robinson andR. M. King. 1979. Neue Sesquiterpenlactone aus_Eupatorium sessilifolium_. Phytochemistry18: 1401.
  CAS Google Scholar
• — andD. Ehlers. 1977. Ein neues_cis_, cis-germacranolid aus_Chrysanthemum poteriifolium_. Phytochemistry16: 137.
  CAS Google Scholar
• —— andC. Zdero. 1978. Einige neue Furanoeremophilane aus_Senecio-_ arten. Phytochemistry17: 467.
  CAS Google Scholar
• ——— andM. Grenz. 1977. Über Inhaltsstoffe der Gattung_Ligularia_. Chem. Ber.110: 2640.
  CAS Google Scholar
• — andL. Fiedler. 1978. Notiz über ein neues Germacrolid aus_Chromolaena glaberrima_ (DC.) K. et R. Chem. Ber.111: 408.
  CAS Google Scholar
• —,U. Fritz andL. Dutta. 1980. Neue Acetylenverbindungen aus_Leucanthe-_ mum-arten und Revision der Strucktur eines Germacranolids. Phytochemistry19: 841.
  CAS Google Scholar
• ——R. M. King andH. Robinson. 1981. Fourteen heliangolides from_Calea_ species. Phytochemistry20: 743.
  CAS Google Scholar
• -,and M. Grenz. 1969. Über ein neues Sesquiterpenlacton aus_Pluchea dioscorides_ DC. Tetrahedron Lett. 5111.
• ——. 1979. Ein neues Furanoeremophilan-derivat aus_Ligularia macrophylla_. Phytochemistry18: 491.
  CAS Google Scholar
• ——. 1979. Ein neues Germacranolid aus_Munnozia maronii_. Phytochemistry18: 334.
  CAS Google Scholar
• —— andA. Suwita. 1977. Inhaltsstoffe aus_Gynoxys_ und_Pseudogynoxys-_ arten. Phytochemistry16: 774.
  CAS Google Scholar
• —— andC. Zdero. 1977. Naturally-occurring terpene derivatives. Constituents of the_Liabum_ group. Phytochemistry16: 285.
  CAS Google Scholar
• —,R. K. Gupta, J. Jakupovic, R. M. King andH. Robinson. 1981. Secoeremophilanolides from_Senecio macrotis_. Phytochemistry20: 1155.
  CAS Google Scholar
• — andJ. Jakupovic. 1979. Neue Germacranolide aus_Calea urticifolia_. Phytochemistry18: 119.
  CAS Google Scholar
• ——. 1979. Zwei neue Sesquiterpenlactone und eine neue Sesquiterpensäure aus_Helenium puberulum_. Phytochemistry18: 131.
  CAS Google Scholar
• ——. 1979. Neue Labdan-derivat und Sesquiterpene aus_Silphium-_ arten. Phytochemistry18: 1987.
  CAS Google Scholar
• ——,M. Ahmed, M. Grenz, H. Suding, H. Robinson and R. M. King. 1981. Germacranolides and diterpenes from_Viguiera_ species. Phytochemistry20: 113.
  CAS Google Scholar
• ——A. K. Dhar, R. M. King andH. Robinson. 1981. Heliangolides and diterpenes from_Hartwrightia floridana_. Phytochemistry20: 843.
  CAS Google Scholar
• ——,L. Dutta andM. Goodman. 1980. Neue, Abgewandelte Pseudoguajanolide aus_Psilostrophe villosa_. Phytochemistry19: 1491.
  CAS Google Scholar
• ——,A. K. Dhar, R. M. King andH. Robinson. 1981. Two sesquiterpene and three diterpene lactones from_Acanthospermum australe_. Phytochemistry20: 1081.
  CAS Google Scholar
• ——,R. K. Gupta, R. M. King andH. Robinson. 1981. Allenic germacranolides, bourbonene-derived lactones and other constituents from_Vernonia_ species. Phytochemistry20: 473.
  CAS Google Scholar
• ——,R. M. King andH. Robinson. 1980. Neue Ent-atisirenund Ent-kaurensäure-derivat aus Helianthus-arten. Phytochemistry19: 863.
  CAS Google Scholar
• —— andM. Lonitz. 1977. Über Inhaltsstoffe der_Eupatorium_ Gruppe. Chem. Ber.110: 301.
  CAS Google Scholar
• ——,H. Robinson andR. M. King. 1981. Five germacranolides from_Gochnatia discoidea_. Phytochemistry20: 109.
  CAS Google Scholar
• —— andC. Zdero. 1978. Neue Norsesquiterpene aus_Rudbeckia laciniata_ und_Senecio paludaffinis_. Phytochemistry17: 2034.
  CAS Google Scholar
• ———R. M. King andH. Robinson. 1979. Neue Melampolide und_cis_, cis-germacranolide aus Vertretern der Subtribus Melampodiinae. Phytochemistry18: 625.
  CAS Google Scholar
• — andK. H. Knoll. 1978. Weitere Furanoeremophilane aus Othonna-arten. Phytochemistry17: 461.
  CAS Google Scholar
• ——. 1979. Eine neues Norsesquiterpen und Andere Inhaltsstoffe aus Ligularia-arten. Phytochemistry18: 877.
  CAS Google Scholar
• ——. 1979. Neuartige Sesquiterpenlactone und neue Acetylenvergingen aus Athanasia-arten. Phytochemistry18: 995.
  CAS Google Scholar
• —— andN. A. El-Emary. 1981. Neurartige Sesquiterpenelactone aus_Pulicaria crispa_. Phytochemistry18: 1231.
  Google Scholar
• ——H. Robinson andR. M. King. 1980. Neue Eudesmanolide aus_Steiractinia mollis_. Phytochemistry19: 971.
  CAS Google Scholar
• ————. 1980. Neue Kaurenderivate und Melampolide aus_Smallanthus uvedalia_. Phytochemistry19: 107.
  CAS Google Scholar
• ————. 1980. Neue Guaianolide aus_Cacosmia rugosa_. Phytochemistry19: 599.
  CAS Google Scholar
• ——C. Zdero, P. K. Mahanta, M. Grenz, A. Suwita, D. Ehlers, N. LeVan, W. R. Abraham andA. A. Natu. 1977. Terpen-derivat aus Senecio-arten. Phytochemistry16: 965.
  CAS Google Scholar
• — andN. LeVan. 1977. Neue Guajanolide aus_Podachaenium eminens_. Phytochemistry16: 1304.
  CAS Google Scholar
• ——. 1977. Sesquiterpenlactone und Polyine aus der Gattung_Arctotis_. Phytochemistry16: 487.
  CAS Google Scholar
• ——. 1978. New germacranolides from_Dicoma anomala_. Phytochemistry17: 570.
  CAS Google Scholar
• ——. 1978. Neue Sesquiund Diterpene aus_Bedfordia salicina_. Phytochemistry17: 1173.
  CAS Google Scholar
• ——. 1978. Neue Kaurensäure-derivat und Germacranolide aus_Montanoa pteropoda_. Phytochemistry17: 1957.
  CAS Google Scholar
• ——,T. V. Cuong Pham, J. Jakupovic, A. Schuster, V. Zable andW. H. Watson. 1979. β-Isocomen, ein neues Sesquiterpen aus Berkheya-arten. Phytochemistry18: 1831.
  CAS Google Scholar
• — andM. Lonitz. 1978. Neue Sandaracopimardien-derivat, Sesquiterpene und Sesquiterpenlactone aus Zexmenia-arten. Chem. Ber.111: 843.
  CAS Google Scholar
• ——. 1980. Naturlich vorkommende Terpenderivate, 272. Uber die Inhaltsstoffe von_Zexmenia gnaphaloides_ und die Synthese von Valerenan-derivaten. Chem. Ber.113: 2410.
  CAS Google Scholar
• — andP. K. Mahanta. 1979. Zwei neue Pseudoguajanolide aus_Telekia speciosa_. Phytochemistry18: 887.
  CAS Google Scholar
• —— andL. N. Dutta. 1979. Weitere Hirsutinolide aus Vernonia-arten. Phytochemistry18: 289.
  Google Scholar
• ——,J. Jakupovic, R. C. Rastogi andA. A. Natu. 1978. New sesquiterpene lactones from_Inula_ species. Phytochemistry17: 1165.
  CAS Google Scholar
• ——,A. Suwita, A. Suwita, A. A. Natu, C. Zdero, W. Dorner, D. Ehlers andM. Grenz. 1977. Neue Sesquiterpenlactone und andere Inhaltsstoffe aus Vertretern der Eupatorium-gruppe. Phytochemistry16: 1973.
  CAS Google Scholar
• ——,A. A. Natu, R. M. King andH. Robinson. 1978. New germacranolides from_Isocarpha_ species. Phytochemistry17: 471.
  CAS Google Scholar
• —,L. Müller, R. M. King andH. Robinson. 1981. A guaianolide and other constituents from_Lychnophora_ species. Phytochemistry20: 1149.
  CAS Google Scholar
• —,A. A. Natu andP. K. Mahanta. 1978. Naturally-occurring terpene derivatives. Part 122. New diterpenes and germacranolides from_Mikania_ species. Phytochemistry17: 483.
  CAS Google Scholar
• —,E. Rosenberg, H. Robinson andR. M. King. 1980. Pseudoguaianolides from_Wedelia grandiflora_. Phytochemistry19: 2047.
  CAS Google Scholar
• — andA. Suwita. 1976. Weitere Furanoeremophilane aus Othonna-arten. Chem. Ber.109: 1230.
  CAS Google Scholar
• —— andP. Mahanta. 1976. Weitere Inhaltsstoffe aus Senecio-arten. Chem. Ber.109: 3570.
  CAS Google Scholar
• ——. 1979. Ein neues Guajanolid und ein Secoguajanolid aus_Helichrysum splendidum_. Phytochemistry18: 885.
  CAS Google Scholar
• ——,R. M. King andH. Robinson. 1980. Neue Guajanolide aus_Eupatorium rotundifolium_. Phytochemistry19: 1233.
  CAS Google Scholar
• ——,H. Robinson andR. M. King. 1979. Ein neues Toxol-derivat aus_Austrobrickellia patens_. Phytochemistry18: 2055.
  CAS Google Scholar
• ——,A. A. Natu, H. Czerson andA. Suwita. 1977. Über Weitere α-Longipinen Derivat aus Compositen. Chem. Ber.110: 3572.
  CAS Google Scholar
• -,and C. Zdero. 1970. New benzofuran derivatives from_Doronicum austriaeum_ Jacq. Tetrahedron Lett. 3575.
• ——. 1971. Prutenin, 4-angeloyloxy-pruteninon sowie 4-Acetoxy—pruteninon und Isopruteninon. Vier neue Sesquiterpenlactone aus_Laserpitium prutenicum_ L. Chem. Ber.104: 1611.
  CAS Google Scholar
• -and -. 1972. Zwei neue Sesquiterpenlactone aus_Lidbeckia pectinata_ Berg und_Pentzia elegans_ DC. Tetrahedron Lett. 621.
• ——. 1974. Naturally-occurring terpene derivatives XXXII. New sesquiterpene lactones from_Osmitopsis asteriscoides_. Chem. Ber.107: 1409.
  CAS Google Scholar
• ——. 1974. Über neue Sesquiterpene der Gattung_Senecio_. Chem. Ber.107: 2912.
  CAS Google Scholar
• ——. 1975. Ein neues Sesquiterpenlactone aus_Matricaria suffructicosa_ var.leptoloba. Chem. Ber.108: 437.
  CAS Google Scholar
• ——. 1975. Über neue Inhaltsstoffe der Gattung_Anthemis_. Chem. Ber.108: 1902.
  CAS Google Scholar
• ——. 1976. Ein neues Sesquiterpenlacton aus_Dugesia mexicana_ Gray. Chem. Ber.109: 2651.
  CAS Google Scholar
• - and -. Über ein neues Diterpen aus_Melampodium perfoliatum_ (Cav.). A. Gray. Chem. Ber.109: 1670.
• ——. 1976. Neue Furanoeremophilane aus Mexikanischen_Senecio-_ arten. Chem. Ber.109: 819.
  CAS Google Scholar
• ——. 1977. Ein neues Guajanolid aus_Matricaria zuurbergensis_. Phytochemistry16: 136.
  CAS Google Scholar
• ——. 1977. Über Inhaltsstoffe der Tribus Mutisieae. Phytochemistry16: 239.
  CAS Google Scholar
• ——. 1977. Ein neues Germacranolid aus_Simsia dombeyana_. Phytochemistry16: 776.
  CAS Google Scholar
• ——. 1977. Inhaltsstoffe aus Vernonia-arten. Phytochemistry16: 778.
  CAS Google Scholar
• ——. 1977. New germacrolides from_Calea zacatechichi_. Phytochemistry16: 1065.
  CAS Google Scholar
• ——. 1977. Neue Sesquiterpenlactone und Thymol-derivat aus_Inula-_ arten. Phytochemistry16: 1243.
  CAS Google Scholar
• ——. 1977. Ein neues Clerodan-derivat sowie Weitere Inhaltsstoffe aus der Gattung_Macowania_. Phytochemistry16: 1583.
  CAS Google Scholar
• ——. 1977. Neue Germacranolide aus_Platycarpha glomerata_. Phytochemistry16: 1832.
  CAS Google Scholar
• ——. 1978. Inhaltsstoffe Sudamerikanischer Senecio-arten. Phytochemistry17: 134.
  Google Scholar
• ——. 1978. New norsesquiterpenes from_Senecio digitalifolius_. Phytochemistry17: 759.
  CAS Google Scholar
• ——. 1978. Neue Furanoeremophilane und andere Sesquiterpene aus Vertreten der Gattung_Euryops_. Phytochemistry17: 1135.
  CAS Google Scholar
• ——. 1978. New furanoeremophilanes from South African_Senecio_ species. Phytochemistry17: 1161.
  CAS Google Scholar
• ——. 1978. New sesquiterpenes and acetylenes from_Athanasia_ and_Pentzia_ species. Phytochemistry17: 1595.
  CAS Google Scholar
• ——. 1978. Neue Guajanolide aus Lasthenia-arten. Phytochemistry17: 2032.
  CAS Google Scholar
• ——. 1979. Neue Germacranolide und andere Inhaltsstoffe aus Vertretern der Subtribus Gochnatiinae. Phytochemistry18: 95.
  CAS Google Scholar
• ——. 1979. Neue Sesquiterpene mit anomalen Kohlenstoffgerüst aus der Tribus Mutisieae. Chem. Ber.112: 427.
  CAS Google Scholar
• ——. 1979. Über eine neue Gruppe von Sesquiterpenlactonen aus der Gattung_Trixis_. Chem. Ber.112: 435.
  CAS Google Scholar
• ——. 1979. Neue C10-säureamide, Furanoeremophilane und andere Inhaltsstoffe aus Bolivianischen Senecio-arten. Phytochemistry18: 125.
  CAS Google Scholar
• ——. 1979. Ein neues Germacren-derivat aus_Iva xanthifolia_. Phytochemistry18: 1892.
  CAS Google Scholar
• ——. 1979. Neue Eudesmanolide aus_Gazania krebsiana_. Phytochemistry18: 332.
  CAS Google Scholar
• ——. 1979. Ein neues Furanoeremophilan-derivat aus_Gynoxys psilophylla_. Phytochemistry18: 339.
  CAS Google Scholar
• ——. 1979. 3β-isovaleryloxycostunolid, ein neues Germacranolid aus_Cotula hispida_. Phytochemistry18: 336.
  CAS Google Scholar
• ——. 1979. Zwei neue Eudesman-derivat aus_Iva annua_. Phytochemistry18: 2034.
  CAS Google Scholar
• ——. 1980. Neue Sesquiterpenlactone und Nerolidol-derivat aus_Ur-_ sinia-arten. Phytochemistry19: 587.
  CAS Google Scholar
• ——,D. Berger, A. Suwita, P. Mahanta andC. Jeffrey. 1979. Neue Furanoeremophilane und Weitere Inhaltsstoffe aus Südafrikanischen Senecio-arten. Phytochemistry18: 79.
  CAS Google Scholar
• —— andM. Grenz. 1974. Neue Sesquiterpene der Gattung_Othonna_. Chem. Ber.107: 3928.
  CAS Google Scholar
• ———. 1974. Über die Inhaltsstoffe der Gattung_Euryops_. Chem. Ber.107: 2730.
  CAS Google Scholar
• ———. 1977. Weitere Inhaltsstoffe aus Sudafrikanischen_Sene-_ cio-arten. Chem. Ber.110: 474.
  CAS Google Scholar
• ——R. M. King andH. Robinson. 1979. Neue Elemanolide und Guajanolide aus_Zinnia-arten_. Phytochemistry18: 1343.
  CAS Google Scholar
• ————. 1979. Weitere Isocedren-derivat aus_Trixis paradoxa_. Phytochemistry18: 855.
  CAS Google Scholar
• ————. 1979. Neue Sesquiterpenlactone aus_Stokesia laevis_. Phytochemistry18: 987.
  CAS Google Scholar
• ————. 1980. Ein neues Germacran-8, 12-olid und neue Diterpene aus_Polymnia canadensis_. Phytochemistry19: 115.
  CAS Google Scholar
• ————. 1980. New heliangolides from_Conocliniopsis prasiifolia_. Phytochemistry19: 1547.
  CAS Google Scholar
• ————. 1980. New sesquiterpene lactones and other constituents from_Fitchia speciosa_. Phytochemistry19: 1141.
  CAS Google Scholar
• ————. 1980. Seven guaianolides from the tribe Vernonieae. Phytochemistry19: 2669.
  CAS Google Scholar
• ————. 1980. Sesquiterpene lactones from_Eremanthus_ species. Phytochemistry19: 2663.
  CAS Google Scholar
• ————. 1981. Two hirsutinolides and a germacranolide from_Chresta sphaerocephala_. Phytochemistry20: 518.
  CAS Google Scholar
• ————. 1981. Germacranolides, a guaianolide with a β-Mactone ring and further constituents from_Grazielia_ species. Phytochemistry20: 1069.
  CAS Google Scholar
• —— andM. Lonitz. 1977. Neue Guajen-derivat aus_Parthenium hysterophorus_ und ein Weiteres Pseudoguajanolid aus_Ambrosia cumanensis_. Phytochemistry16: 575.
  CAS Google Scholar
• —— andP. K. Mahanta. 1977. Neue Eremophilan-derivat aus_Lopho-_ laena-arten. Phytochemistry16: 1769.
  CAS Google Scholar
• ——J. Pickard, H. Robinson andR. M. King. 1981. New types of sesquiterpene lactones and other constituents from_Trichogonia_ species. Phytochemistry20: 1323.
  CAS Google Scholar
• ——,H. Robinson andR. M. King. 1980. Caryophyllene derivatives and a heliangolide from_Lychnophora_ species. Phytochemistry19: 2381.
  CAS Google Scholar
• ———— 1980. Guaianolides from_Agrianthus pungens_. Phytochemistry19: 1873.
  CAS Google Scholar
• ————. 1980. A germacranolide from_Mattfeldanthus nobilis_. Phytochemistry19: 2473.
  CAS Google Scholar
• ————. 1981. Germacranolides from_Piptolepis ericoides_ and_Vanillosmopsis_ species. Phytochemistry20: 731.
  CAS Google Scholar
• ——R. Bohlmann, R. M. King andH. Robinson. 1980. Neue Sesquiterpene aus Liabum-arten. Phytochemistry19: 579.
  CAS Google Scholar
• — andJ. Ziesche. 1980. Neue Guajanolide und Acetylenverbindungen aus_Pti-_ lostemon-arten. Phytochemistry19: 692.
  CAS Google Scholar
• ——. 1980. New sesquiterpenes from_Senecio_ species. Phytochemistry19: 1851.
  CAS Google Scholar
• ——. 1980. Eremophilane derivatives from_Senecio_ species. Phytochemistry19: 2681.
  CAS Google Scholar
• ——,R. M. King andH. Robinson. 1980. Neue Melampolide aus_Smallanthus fructicosus_. Phytochemistry19: 973.
  CAS Google Scholar
• ————. 1981. Melampolides and other germacranolides from_Blainvillea dichotoma_. Phytochemistry20: 263.
  CAS Google Scholar
• ————. 1981. Eudesmanolides and diterpenes from_Wedelia trilobata_ and an ent-kaurenic acid derivative from_Aspilia parvifolia_. Phytochemistry20: 751.
  CAS Google Scholar
• ————. 1981. Eudesmanolides and other constituents from_Dimerostemma asperatum_. Phytochemistry20: 1335.
  CAS Google Scholar
• ——H. Robinson andR. M. King. 1981. Seven germacranolides and four eudesmanolides from_Tithonia rotundifolia_. Phytochemistry20: 267.
  CAS Google Scholar
• ————. 1981. A pseudoguaianolide and a hydroxygeranylnerol from_Kingianthus paradoxus_. Phytochemistry20: 1146.
  CAS Google Scholar
• —,P. Zitzkowski, A. Suwita andL. Fiedler. 1978. Cis-kolaveninsäure und Weitere Inhaltsstoffe aus Vertretern der Tribus Eupatorieae. Phytochemistry17: 2101.
  CAS Google Scholar
• Borges, J. M., T. Manresa, J. L. Martin, C. Pascual andP. Vázquez. 1978. Altamisin. A new sesquiterpene lactone from_Ambrosia cumanensis_ HBK. Tetrahedron Lett.17: 1513.
  Google Scholar
• Borges del Castillo, J., M. T. M. Ferrero, J. L. M. Ramón, C. P. Rigau andP. Vásquez Bueno. 1979. Paulitin and isopaulitin, two new sesquiterpene lactones from_Ambrosia cumanensis_ HBK. Bol. Soc. Quím. Perú45: 53.
  CAS Google Scholar
• ——,F. Rodriquez Luis andP. Vásquez Bueno. 1981. Salvadorean Compositae. II. Juanislamin and 2,3-epoxy-juanislamin, two new sesquiterpenic lactones from_Calea urticifolia_. J. Nat. Prod.44: 348.
  CAS Google Scholar
• Bohm, B. A. 1978. Helenieae (sensu Bentham)—chemical review. Page 739_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Borsutzki, L. H. 1955. Chemistry of_Artemisia maritima_. Arch. Pharm.288: 336; Chem. Abstr.51: 6941h (1957).
  CAS Google Scholar
• Breinlich, J. 1970. Active ene-yne substances in some pharmaceutically useful Compositae drugs, with special consideration to_Achillea millefolium_ [Yarrow]. Pharm. Ztg.115: 1699, 1713; Chem. Abstr.74: 115833u (1971).
  CAS Google Scholar
• Büichi, G. andD. Rosenthal. 1956. The structures of helenalin and isohelenalin. J. Amer. Chem. Soc.78: 3860.
  Google Scholar
• Burnett, W. C., S. B. Jones, T. J. Mabry andW. G. Padolina. 1974. Sesquiterpene lactones—insect feeding deterrents in_Vernonia_. Biochem. System. Ecol.2: 25.
  CAS Google Scholar
• Cabrera, A. L. 1970. Mustisieae—Systematic review. Page 1039_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Calzada, J. G. andJ. F. Ciccio. 1978. Aislamiento de tirotundina a partir de_Tithonia diversifolia_ (Hemsl.) Gray. Rev. Latinoamer. Quim.9: 202.
  CAS Google Scholar
• Castille, A. 1966. Pyrethol. An. Real Acad. Farm.32: 121; Chem. Abstr.66: 65658c (1967).
  CAS Google Scholar
• Cekan, Z., V. Herout andF. Sôrm. 1957. Die Struktur von Matricin, ein Guajanolid aus der Kamille (Matricaria chamomilla L.). Collect. Czech. Chem. Commun.22: 1921.
  Google Scholar
• ———. 1954. Isolation and properties of the prochamazulene from_Matricaria chamomilla_ L., a further compound of the guaianolide group. Collect. Czech. Chem. Comm.19: 798.
  CAS Google Scholar
• —,V. Prochazka, V. Herout andF. Sôrm. 1959. Isolation and constitution of matricarin, another guaianolide from camomile (Matricaria chamomilla L.). Collect. Czech. Chem. Comm.24: 1554.
  CAS Google Scholar
• ————. 1960. Isolation of globicin, a guaianolide from_Matricaria globifera_ (Thunb.) Druce. Collect. Czech. Chem. Comm.25: 2553.
  CAS Google Scholar
• Chien, M. K., C. H. Chen andK. F. Tseng. 1963. The constituents of Yejuhua, the flower of_Chrysanthemum indicum_. Yao Hsueh Pao10: 129; Chem. Abstr.59: 15326b (1963).
  CAS Google Scholar
• Chikamatsu, H. andW. Herz. 1973. Ivalbatin, a new xanthanolide from_Iva dealbata_. J. Organ. Chem. (USA)38: 585.
  CAS Google Scholar
• Chugunov, P. V., D. A. Pakaln andA. M. Shreter. 1970. Lactone from_Inula germanica_. Khim. Prir. Soedin.6: 478; English ed. p. 495; Chem. Abstr.74: 1052h (1971).
  CAS Google Scholar
• —,K. S. Rybalko andA. I. Shreter. 1971. The structure of the sesquiterpene lactone saupirin. Khim. Prir. Soedin.7: 727; English ed. p. 706; Chem. Abstr. 76: 127168k (1972).
  CAS Google Scholar
• —,V. I. Sheichenko, A. I. Ban’kovskii andK. S. Rybalko. 1971. The structure of britannin. A sesquiterpene lactone from_Inula britannica_. Khim. Prir. Soedin.7: 276; Chem. Abstr.75: 110438e (1971).
  Google Scholar
• Ciccio, J. F. and J. G. Calzada. 1978. Glabberin, a new heliangolide from_Eupatorium glaberrimum_. Abstract, Book V. International symposium for the chemistry of natural products. Monterrey, Mexico, April 26–29.
• ——. 1981. Haagenolide, the major sesquiterpene lactone of_Baltimora recta_. Phytochemistry20: 517.
  CAS Google Scholar
• Clemo, G. R. and W. Cocker. 1946. The constitution of ψ-santonin. J. Chem. Soc. (London) 30.
• Corbella, A., P. Gariboldi, G. Jommi, Z. Samek, M. Holub and B. Drozdz. 1972. Absolute stereochemistry of cynaropicrin and related guaianolides. Chem. Commun. 386.
• ———, andG. Ferrari. 1974. Structure and absolute stereochemistry of vanillosmin, a guaianolide from_Vanillosmopsis erythropappa_. Phytochemistry13: 459.
  CAS Google Scholar
• Correa, J. andJ. Romo. 1966. The constituents of_Cacalia decomposita_ A. Gray. Tetrahedron22: 685.
  CAS Google Scholar
• Cowall, P. L., J. M. Cassady, C. Chang andJ. F. Kozlowski. 1981. Isolation and structure determination of piptocarphins A-F, cytotoxic germacranolide lactones from_Piptocarpha chontalensis_. J. Organ. Chem. (USA)46: 1108.
  CAS Google Scholar
• Cronquist, A. 1955. Phylogeny and taxonomy of the Compositae. Amer. Midl. Naturalist53: 478.
  Google Scholar
• —. 1977. The Compositae revisited. Brittonia29: 137.
  Google Scholar
• —. 1980. Chemistry in plant taxonomy: an assessment of where we stand. Page 1_in_ F. A. Bisby, J. G. Vaughn and C. A. Wright (eds.). Chemosystematics: Principles and practice. Academic Press, London and New York.
  Google Scholar
• Dauben, W. G., W. K. Hayes, J. S. P. Schwarz andJ. W. McFarland. 1960. The stereochemistry of ψ-santonin. J. Amer. Chem. Soc.82: 2232.
  Google Scholar
• —,J. S. P. Schwarz, W. K. Hayes andP. D. Hance. 1960. The structures of two new sesquiterpene lactones from_Artemisia_. J. Amer. Chem. Soc.82: 2239.
  Google Scholar
• Davis, P. H. andV. H. Heywood. 1963. Principles of angiosperm taxonomy. D. Van Nostrand Company, Inc., Princeton and New York.
  Google Scholar
• De Kock, W. T., K. G. R. Pachler, W. F. Ross, P. L. Wessels andI. C. duPreez. 1968. Griesenin and dihydrogriesenin, two new sesquiterpenoid lactones from_Geigeria africana_ Gries. I. Structures. Tetrahedron24: 6037.
  Google Scholar
• ——. 1968. Gafrinin, a sesquiterpenoid lactone from_Geigeria africana_ Gries. II. Conformation. Tetrahedron24: 1701.
  Google Scholar
• —— andP. L. Wessels. 1968. Griesenin and dihydrogriesenin, two new sesquiterpenoid lactones from_Geigeria africana_ Gries. III. Nuclear magnetic resonance studies and conformation. Tetrahedron24: 6045.Chem. Abstr.69: 96888u (1968).
  Google Scholar
• DeSilva, L. B. andT. A. Geissman. 1969. Sesquiterpene lactone, psilotropin from_Psilostrophe cooperi_. Phytochemistry9: 59.
  Google Scholar
• Deuel, P. G. andT. A. Geissman. 1959. Xanthinin. II. The structures of xanthinin and xanthatin. J. Amer. Chem. Soc.79: 3778.
  Google Scholar
• De Villiers, J. 1961. The isolation and structure of gafrinin, a sesquiterpenoid lactone from_Geigeria africana_. J. Chem. Soc. (London)2049.
• Dittrich, M. 1978. Cynareae—systematic review. Page 999_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Dolejs, L. andV. Herout. 1962. Constitution of eupatoriopicrin, a germacranolide from_Eupatorium cannabinum_ L. Collect. Czech. Chem. Comm27: 2654.
  CAS Google Scholar
• —,M. Soucek, M. Horak, V. Herout andF. Sôrm. 1958. The structure of lactucin. Collect. Czech. Chem. Comm.23: 2195.
  Google Scholar
• Domínguez, X. A. 1978. Eupatorieae—Chemical review. Page 487_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• —,D. Butruille etAquilino andY. Aubad. 1970. La neoleonine: un nouveau pseudoguaianolide. Rev. Latinoamer. Quím.1: 136.
  Google Scholar
• — andE. Cárdenas. 1975. Achillin and deacetylmatricarin from two_Artemisia_ species. Phytochemistry14: 2511.
  Google Scholar
• —,R. Franco, F. Bohlmann andR. Bohlmann. 1980. A pseudoguaianolide from_Hymenoxys linearifolia_. Phytochemistry19: 2204.
  Google Scholar
• -,M. Gutiérrez and R. Aragón. 1976. Isolation of baileyolin, a tumor-inhibitory and antibiotic sesquiterpene lactone from_Baileya multiradiata_. Pl. Med. 356; Chem. Abstr.86: 86150j (1977).
• —,F. M. Pérez andL. Leyter. 1971. Xanthinin and β-sitosterol from_Xanthium orientale_. Phytochemistry10: 2828.
  Google Scholar
• —,R. Villarreal, R. Franco andF. Bohlmann. 1981. A melampolide from_Melampodium heterophyllum_. Phytochemistry20: 1431.
  Google Scholar
• Domínguez, E. andJ. Romo. 1963. Mexicanin I. A new sesquiterpene lactone related to tenulin. Tetrahedron19: 1415.
  Google Scholar
• Doskotch, R. W. andF. S. El-Feraly. 1970. The structure of tulipinolide and epitulipinolide, cytotoxic sesquiterpenes from_Liriodendron tulipifera_ L. J. Organ. Chem. (USA)35: 1928.
  CAS Google Scholar
• ——. 1969. Isolation and characterization of (+)-sesamin and β-cyclopyrethrosin from pyrethrum flowers. Canad. J. Chem.47: 1139.
  CAS Google Scholar
• —— andC. D. Hufford. 1971. Sesquiterpene lactones from pyrethrum flowers. Canad. J. Chem.49: 2103.
  CAS Google Scholar
• Drozdz, B. 1966. Isolation of cnicin from the herbs of_Centaurea diffusa_ Lam. Dissertation Pharm. et Pharmacol. (Poland)18: 281.
  CAS Google Scholar
• ——. 1967. The occurrence of cnicin in the herbs of_Centaurea calcitrapa_ L.,C. iberica Trev., and_C. ovina_ Pal. Dissertation Pharm. et Pharmacol. (Poland)19: 223.
  Google Scholar
• ——. 1968. Bitter sesquiterpene lactones in species of the tribe Cynareae. Dissertation Pharm. et Pharmacol. (Poland)20: 93.
  Google Scholar
• —,H. Grabarczyk, Z. Samek, M. Holub, V. Herout andF. Sôrm. 1972. Sesquiterpenic lactones from_Eupatorium cannabinum_ L. Revision of the structure of eupatoriopicrin. Collect. Czech. Chem. Comm.37: 1546.
  Google Scholar
• ——,M. Holub, Z. Samek, V. Herout andF. Sôrm. 1968. The constitution and absolute configuration of onopordopicrine, a sesquiterpenic lactone from_Onopordon acanthium_ L. Collect. Czech. Chem. Comm.33: 1730.
  Google Scholar
• —,Z. Samek, M. Holub andV. Herout. 1973. The structure of alatolide, a sesquiterpenic lactone from_Jurinea alata_ Cass. Collect. Czech. Chem. Comm.38: 727.
  Google Scholar
• See Reference No. 232, Literature Cited.
• Dullforce, T. A., G. A. Sim, D. N. J. White, J. E. Kelsey and S. M. Kupchan. 1969. The stereochemistry of gaillardin. Tetrahedron Lett. 973.
• Ehrendorfer, F. 1964. Notizen zur Cytotaxonomie und Evolution der Gattung_Artemisia_. Oesterr. Bot. Z.3: 84.
  Google Scholar
• El-Emary, N. A. andF. Bohlmann. 1980. Zwei neue Germacranolide aus_Artemisia argentea_. Phytochemistry19: 845.
  CAS Google Scholar
• Ellison, W. L. 1964. A systematic study of the genus_Bahia_ (Compositae). Rhodora66: 177; 281.
  Google Scholar
• Elsohly, M. A., J. C. Craig, C. E. Turner andA. S. Sharma. 1977. Constituents of_Helenium amarum_. II. Isolation and characterization of heleniamarin and other constituents. Lloydia40: 609.
  Google Scholar
• Erdtman, H. 1968. The assessment of biochemical techniques in plant taxonomy,in J. G. Hawkes (ed.). Chemotaxonomy and serotaxonomy. Academic Press, London.
  Google Scholar
• —. 1973. Molecular taxonomy. Page 327_in_ L. P. Miller (ed.). Phytochemistry. Vol. 3. Van Nostrand, Reinhold Co., New York.
  Google Scholar
• Evstratova, R. I., E. Y. Kiseleva, V. I. Sheichenko andK. S. Rybalko. 1971. The structure of acroptilin—a sesquiterpene lactone from_Acroptilon repens_. Khim. Prir. Soedin.7: 272; English ed. p. 262; Chem. Abstr.75: 110451d (1971).
  CAS Google Scholar
• —,K. S. Rybalko andR. Y. Rzazade. 1967. Acroptilin—a new sesquiterpene lactone from_Acroptilon repens_. Khim. Prir. Soedin.3: 284; English ed. p. 239; Chem. Abstr.68: 3005v (1968).
  CAS Google Scholar
• —,V. I. Sheichenko andK. S. Rybalko. 1974. Sesquiterpene lactones from_Inula japonica_. Khim. Prir. Soedin.10: 730; English ed. p. 752.
  Google Scholar
• ——— andA. I. Ban’kovskii. 1969. Structure of arnifoline, a sesquiterpene lactone from_Arnica foliosa_ and_Arnica montana_. Khim. Farm. Zh.3: 39; Chem. Abstr.72: 32047y. (1970).
  CAS Google Scholar
• ——,A. I. Ban’kovskii andK. S. Rybalko. 1969. Structure of erivanin. Khim. Prir. Soedin.5: 239; Chem. Abstr.72: 32051v (1970).
  CAS Google Scholar
• —— andK. S. Rybalko. 1973. The structure of acroptilin, a sesquiterpene lactone from_Acroptilon repens_. Khim. Prir. Soedin.9: 161; English ed. p. 156; Chem. Abstr.79: 5466x (1973).
  Google Scholar
• —, andA. M. Sinyukhin. 1971. Ketopelenolide B from_Artemisia anethifolia_. Khim. Prir. Soedin.7: 839; English ed. p. 819.
  CAS Google Scholar
• Farkas, L., M. Nogradi, V. Sudarsanam andW. Herz. 1967. Isolation, structure proof and synthesis of acerosin from_Iva acerosa_ (Nutt.) Jackson. Tetrahedron23: 3557.
  CAS Google Scholar
• ————. 1966. Constituents of_Iva_ species. V. Isolation, structure and synthesis of nevadensin, a new flavone from_Iva nevadensis_ M. E. Jones and_Iva acerosa_ (Nutt.) Jackson. J. Organ. Chem. (USA)31: 3228.
  CAS Google Scholar
• Ferreira, Z. S., N. F. Rogue, O. R. Gottlieb, F. Oliveira andH. E. Gottlieb. 1980. Structural clarification of germacranolides from_Calea_ species. Phytochemistry19: 1481.
  CAS Google Scholar
• Fischer, N. H. 1978. On the biogenesis of pseudoguaianolides. Rev. Latinoamer. Quim.9: 41.
  CAS Google Scholar
• -,and T. J. Mabry. 1967. The structure of tamaulipin-B, a new germacranolide and the thermal conversion of a trans-1,2-divinylcyclohexane derivative into a cyclodeca-l,5-diene system. Chem. Commun. 1235.
• ——. 1967. New pseudoguaianolides from_Ambrosia confertiflora_ DC. (Compositae). Tetrahedron23: 2529.
  CAS Google Scholar
• —— andH. B. Kagan. 1968. The structure of tamaulipin A. A new germacranolide from_Ambrosia confertiflora_ DC. (Compositae). Tetrahedron24: 4091.
  CAS Google Scholar
• —,E. J. Olivier andH. D. Fischer. 1979. The biogenesis and chemistry of sesquiterpene lactones. Page 48_in_ W. Herz, H. Grisebach and G. W. Kirby (eds.). Progress in the chemistry of organic natural products. Springer-Verlag, New York.
  Google Scholar
• —,F. C. Seaman, R. A. Wiley andK. D. Haegele. 1978. Melcanthin A, B and C, three new_cis-_ 1(10),cis- 4,5-germacranolides from_Melampodium leucanthum_ (Heliantheae, Compositae). J. Organ. Chem. (USA)43: 4984.
  CAS Google Scholar
• —,R. A. Wiley, D. L. Perry andK. D. Haegele. 1976. Melampodinin, leucanthinin and melampolidin, three new melampolides from_Melampodium_ (Compositae). J. Organ. Chem. (USA)41: 3956.
  CAS Google Scholar
• ——,H. N. Lin, K. Karimian andS. M. Politz. 1975. New melampolide sesquiterpene lactones from_Melampodium leucanthum_. Phytochemistry14: 2241.
  CAS Google Scholar
• -, -and J. D. Wander. 1972. Melampodin, a new germacranolide from_Melampodium leucanthum_ Torr. and Gray var.leucanthum (Compositae). Chem. Commun.137.
• Funk, V. A. 1981. The systematics of_Montanoa_ Cerv. (Asteraceae, Heliantheae). Doctoral Thesis. Ohio State Univ.
• Furukawa, H., K. H. Lee, T. Shingu, R. Meck andC. Piantadosi. 1973. Carolenin and carolenalin, two new guaianolides in_Helenium autumnale_ L. from North Carolina. J. Organ. Chem. (USA)38: 1722.
  CAS Google Scholar
• Gabe, E. J., S. Neidle, D. Rogers and C. E. Nordman. 1971. X-ray determination of the molecular structure of a 3-O-chloro-phenylisoxazoline derivative of pyrethrosin. Chem. Commun. 559.
• Geissman, T. A. 1970. Sesquiterpene lactones of_Artemisia—A. verlotorum_ and_A. vulgaris_. Phytochemistry9: 2377.
  CAS Google Scholar
• —. 1966. Sesquiterpenoid lactones of_Artemisia_ species. I.Artemisia princeps Pamp. J. Organ. Chem. (USA)31: 2523.
  CAS Google Scholar
• —. 1973. The biogenesis of sesquiterpene lactones of the Compositae. Page 65_in_ V. C. Runeckles and T. J. Mabry (eds.). Terpenoids: Structure, biogenesis and distribution. Recent advances in phytochemistry. Vol. 6. Academic Press, New York.
  Google Scholar
• — andS. Atala. 1971. Distribution of eupatoriopicrin in Compositae. Phytochemistry10: 1075.
  CAS Google Scholar
• — andD. H. G. Crout. 1969. Organic chemistry of secondary plant metabolism. Freeman, Cooper & Co., San Francisco.
  Google Scholar
• — andG. A. Ellestad. 1962. Vulgarin, a sesquiterpene lactone from_Artemisia vulgaris_ L. J. Organ. Chem. (USA)27: 1855.
  CAS Google Scholar
• — andT. S. Griffin. 1972. Sesquiterpene lactones of_Artemisia carruthii_. Phytochemistry11: 833.
  CAS Google Scholar
• ——. 1971. Sesquiterpene lactones. Tomentosin from_Montanoa tomentosa_ Cerv. Rev. Latinoamer. Quim.2: 81.
  CAS Google Scholar
• —— andM. A. Irwin. 1969. Sesquiterpene lactones of_Artemisia_. Artecalin from_A. californica_ and_A. tripartita_ ssp.rupicola. Phytochemistry8: 1297.
  CAS Google Scholar
• ——,T. G. Waddell andH. H. Chen. 1969. Some new constituents of_Ambrosia_ species.A. psilostachya and_A. acanthicarpa_. Phytochemistry8: 145.
  CAS Google Scholar
• — andM. A. Irwin. 1970. Chemical contributions to taxonomy and phylogeny in the genus_Artemisia_. Pure Appl. Chem.21: 167.
  CAS Google Scholar
• ——. 1973. Chemical constitution and botanical affinity in_Artemisia_. Page 135_in_ G. Bendz and J. Santesson (eds.). Chemistry in botanical classification. Nobel Symp. 25. Academic Press, New York.
  Google Scholar
• — andK. H. Lee. 1971. Sesquiterpene lactones of_Artemisia_: Artemorin and dehydroartemorin (anhydroverlotorin). Phytochemistry10: 419.
  CAS Google Scholar
• ——. 1971. Sesquiterpene lactones of_Artemisia verlotorum_. Phytochemistry10: 663.
  CAS Google Scholar
• — andJ. Levy. 1967. Chamissonin from_Ambrosia acanthicarpa_ Hook. Phytochemistry6: 899.
  CAS Google Scholar
• —,A. J. Lucas, T. Saitoh andW. W. Payne. 1973. Sesquiterpene lactones of_Ambrosia chamissonis_. Biochem. Syst.1: 13; Chem. Abstr.78: 145204q (1973).
  CAS Google Scholar
• — andS. Matsueda. 1968. Constituents of diploid and polyploid_Ambrosia dumosa_ Gray. Phytochemistry7: 1613.
  CAS Google Scholar
• — andR. Murkherjee. 1968. Sesquiterpene lactones of_Encelia farinosa_ Gray. J. Organ. Chem. (USA)33: 656.
  CAS Google Scholar
• — andT. Saitoh. 1972. Ludalbin, a new lactone from_Artemisia ludoviciana_. Phytochemistry11: 1157.
  CAS Google Scholar
• —,T. Stewart andM. A. Irwin. 1967. Sesquiterpene lactones of_Artemisia_ species II.Artemisia tridentata Nutt. ssp.tridentata. Phytochemistry6: 901.
  CAS Google Scholar
• — andF. P. Toribio. 1967. Constituents of_Hymenoclea salsola_ T. and G. Phytochemistry6: 1563.
  CAS Google Scholar
• —,R. J. Turley andS. Murayama. 1966. Chamissonin, a germacranolide from an_Ambrosia_ species. J. Organ. Chem. (USA)31: 2269.
  CAS Google Scholar
• -,and T. E. Winters. 1968. The structure of artabsin. Tetrahedron Lett. 3145.
• Giannasi, D. E. 1979. Systematic aspects of flavonoid biosynthesis and evolution. Bot. Rev.44: 399.
  Google Scholar
• Gill, S., W. Dembinska-Migas, E. Sliwinska, W. M. Daniewski andF. Bohlmann. 1980. Pseudoguaianolides from_Gaillardia grandiflora_. Phytochemistry19: 2049.
  CAS Google Scholar
• Giordano, O. S., E. Guerreiro, J. Romo andM. Jiménez. 1975. Tessaric acid, a component of_Tessaria absinthioides_. Rev. Latinoam. Quím.6: 131.
  CAS Google Scholar
• Gnecco, S., J. P. Poyser, M. Silva, P. G. Sammes andT. W. Tyler. 1973. Sesquiterpene lactones from_Podanthus ovatifolius_. Phytochemistry12: 2469.
  CAS Google Scholar
• Gomes, C. M. R. andO. R. Gottlieb. 1980. Alkaloid evolution and angiosperm systematics. Biochem. System. Ecol.8: 81.
  CAS Google Scholar
• González, M. P., P. J. Nathan andJ. Romo. 1971. Chemistry and spectrometry of cacalone. Rev. Latinoamer. Quím.2: 5; Chem. Abstr.76: 43984k (1972).
  Google Scholar
• González González, A. 1978. Lactuceae—chemical review. Page 1081_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• —,J. M. Arteaga, J. Bermejo Barrera andJ. L. Bretón Funes. 1971. Melitensin, a new sesquiterpene lactone from_Centaurea melitensis_. An. Quim.67: 1243; Chem. Abstr.77: 34722s (1972).
  Google Scholar
• —— andJ. L. Bretón Funes. 1973. Germacranolides from_Centaurea seridis_. Phytochemistry12: 2997.
  Google Scholar
• ———. 1974. Structure and partial synthesis of melitensin. An. Quim.70: 158; Chem. Abstr.81: 78104d (1974).
  Google Scholar
• ———. 1975. Constituents of the Compositae. 27. Elemanolides from_Centaurea melitensis_. Phytochemistry14: 2039.
  Google Scholar
• —,J. Bermejo, J. M. Amaro, G. M. Massanet, A. Galindo andI. Cabrera. 1978. Sesquiterpene lactones from_Centaurea linifolia_ Vahl. Canad. J. Chem.56: 491.
  Google Scholar
• ——,J. L. Bretón Funes andM. Fajardo. 1973. Compounds from plants of the Canary Islands. Sesquiterpene lactones_of Artemisia canariensis_. An. Quím.69: 667; Chem. Abstr.79: 92415w (1973).
  Google Scholar
• ———,M. Massanet, B. Domínguez andJ. M. Amaro. 1976. Absolute configuration of the sesquiterpene lactones centaurepensin (chlorohyssopifolin A), acroptilin (chlorohyssopifolin C) and repin. J. Chem. Soc. Perkin Trans.I: 1663.
  Google Scholar
• ———,G. M. Massanet andJ. Triana. 1974. Chlorohyssopifolin C, D, E and vahlenin, four new sesquiterpene lactones from_Centaurea hyssopifolia_. Phytochemistry13: 1193.
  Google Scholar
• -,-,-, andJ. Triana. 1972. Chlorohyssopifolin A and B, two new sesquiterpene lactones isolated from_Centaurea hyssopifolia_ Vahl. Tetrahedron Lett. 2017.
• ——,I. Cabrera, A. Galindo andG. M. Massanet. 1977. Principios activos de la_Centaurea janeri_ Graells. An. Quím.73: 86.
  Google Scholar
• —— andG. M. Massanet. 1974. 11,13-Dehydromelitensin and chlorohyssopifolin A, sesquiterpene lactones isolated from_Centaurea pullata_ and_nigra_. An. Quím.70: 74; Chem Abstr.80: 130489d (1974).
  Google Scholar
• ————H. Mansilla andA. Galindo. 1978. Two sesquiterpene lactones from_Centaurea canariensis_. Phytochemistry17: 955.
  Google Scholar
• -, -, -,A. D. Dela Rosa and G. M. Massanet. 1976. Sesquiterpene lactones from_Artemisia lanata_ Willd. An. Quím. 695; Chem. Abstr.86: 72910v (1977).
• ——,H. Mansilla, A. Galindo, J. M. Amaro andG. M. Massanet. 1978. Structure and absolute configuration of gallicin, a new germacranolide from_Artemisia_. J. Chem. Soc. Perkin Trans.1: 1243.
  Google Scholar
• ——,G. M. Massanet, J. M. Amaro, B. Domínguez andA. Morales. 1976. Hypochaerin: A new sesquiterpene lactone from_Hypochaeris setosus_. Phytochemistry15: 991.
  Google Scholar
• ——— andJ. Pérez. 1973. Muricatin, a new sesquiterpene lactone isolated from_Amberboa muricata_. An. Quim.69: 1333; Chem. Abstr.81: 4086c (1974).
  Google Scholar
• ——— andJ. Triana. 1974. Picridin and dihydropicridin, revised structures. Phytochemistry13: 611.
  Google Scholar
• ——, andR. M. Rodríquez. 1972. Dihydroestafietone isolated from_Centaurea webbiana_. An. Quím.68: 333; Chem. Abstr.77: 123813q (1972).
  Google Scholar
• -,J. L. Bretón Funes and B. García Marrero. 1973. Lipidiol. Page 341 in ref. 947.
• ——, andJ. Stockel. 1974. Sesquiterpenic lactones from_Artemisia granatensis_. An. Quím.70: 231; Chem. Abstr.81: 117045h (1974).
  Google Scholar
• —,R. Estévez Reyes andJ. Herrera Velázquez. 1975. Sesquiterpene lactones and coumarins of_Artemisia ramosa_. An. Quím.71: 437; Chem. Abstr.83: 128692h (1975).
  Google Scholar
• —,B. García Marrero andJ. L. Bretón Funes. 1970. Structure of grosshemin, lipidiol and isolipidiol. Lactones of_Amberboa lipii_ and their stereochemistry. An. Quím.66: 799; Chem. Abstr.74: 64315s (1971).
  Google Scholar
• See Reference No. 55, Literature Cited.
• Govindachari, T. R., B. S. Joshi andV. N. Kamat. 1965. Structure of parthenolide. Tetrahedron21: 1509.
  CAS Google Scholar
• —,A. R. Sidhaye andN. Viswanathan. 1970. Deoxyelephantopin, a new sesquiterpene from_Elephantopus scaber_. Indian J. Chem.8: 762.
  CAS Google Scholar
• ——— andH. Fuehrer. 1972. Isodeoxyelephantopin, a new germacranediolide from_Elephantopus scaber_. Indian J. Chem.10: 272.
  CAS Google Scholar
• Grabarczyk, H. 1973. The search for sesquiterpene lactones in the species of genera_Ursinia, Venidium_ and_Arctotis_. Pol. J. Pharmacol. Pharm.25: 469; Chem. Abstr.80: 45661j (1974).
  PubMed CAS Google Scholar
• —,B. Drozdz andA. Mozdzanowska. 1973. Lactones in aerial parts of_Tanacetum vulgare_ L. Pol. J. Pharmacol. Pharm.25: 95; Chem. Abstr.78: 156612 × (1973).
  PubMed CAS Google Scholar
• — andB. Makowska. 1975. New sesquiterpene lactones from the herb of_Venidium hirsutum_. Pol. J. Pharmacol. Pharm.27: 107; Chem. Abstr.83: 4995q (1975).
  PubMed CAS Google Scholar
• — andM. Makowska. 1973. Isolation of grosheimin from the herb of_Venidium decurrens_ Less. Pol. J. Pharmacol. Pharm.25: 477; Chem. Abstr.80: 45662k (1974).
  PubMed CAS Google Scholar
• Grant, V. 1957. The plant species in theory and practice.In E. Mayr (ed.). The species problem. Amer. Assoc. Adv. Sci., Washington, D.C.
  Google Scholar
• —. 1971. Plant speciation. Columbia University Press, New York and London.
  Google Scholar
• Greger, H. 1978. Anthemideae—chemical review. Page 899_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Grieco, P. A., T. Oguri, S. Burke, E. Rodríquez, G. T. DeTitta andS. Fortier. 1978. Structure, absolute configuration and synthesis of stramonin-B, a new cytotoxic pseudoguaianolide. J. Organ. Chem. (USA)43: 4552.
  CAS Google Scholar
• Guerrero, C., E. Díaz, M. Martínez, J. Taboada, S. Miranda Plata, M. González Diddi andJ. Téllez. 1977. Determination of the structure of euparhombin and its cytotoxic activity in two cellular lines. Rev. Latinoamer. Quím.8: 123.
  CAS Google Scholar
• —,A. Iriarte, E. Diaz, J. Taboada, M. González Diddi andJ. Téllez. 1975. Determinación de la estructura y estereoquímica de la elemenolida verafinina C, aislamiento de la verafinina B, dos substancias citotóxicas aisladas de_Verbesina_ aff.coahuilensis. Rev. Latinoamer. Quim.6: 119.
  CAS Google Scholar
• —,M. Martínez, E. Díaz andA. Romo de Vivar. 1975. Estructura y esteroquímica de la verafinina, una nueva elemenolida aislada de_Verbesina_ aff.coahuilensis Gray. Rev. Latinoamer. Quim.6: 53.
  CAS Google Scholar
• —,A. Ortega, E. Díaz andA. Romo de Vivar. 1973. Estructura de la viguiestenina y de la desacetil viguiestenina. Rev. Latinoamer. Quím.4: 118.
  CAS Google Scholar
• —,M. Santana andJ. Romo. 1976. Estudio quimico de la_Viguiera augustifolia_ (HBK.) Blake. Rev. Latinoamer. Quím.7: 41.
  CAS Google Scholar
• Güren, K. C., A. Ulubelen andS. Öksüz. 1972. Compositae. Santonin from_Artemisia fragrans_. Phytochemistry11: 3542.
  Google Scholar
• Habib, A. A. M. andA. M. Metwally. 1973. New sesquiterpene keto lactones from_Senecio_. Pl. Med.23: 88; Chem. Abstr.78: 156620y 1973.
  CAS Google Scholar
• Haddad, D. Y. andS. M. Khafagy. 1962. A study of_Achillea santolina_. Isolation of two crystalline principles: Santolin and santolinol. Bull. Chem. Farm.101: 606.
  CAS Google Scholar
• —— andL. El-Fatatry. 1960.Achillea santolina. Isolation of two crystalline principles, santolin and santolinol. J. Pharm. Sci. U.A.R.1: 1, 75; Chem. Abstr.56: 10277g (1962).
  Google Scholar
• Halim, A. F., A. M. Zaghloul andF. Bohlmann. 1980. A further guaianolide from_Arctotis grandis_. Phytochemistry19: 2767.
  CAS Google Scholar
• Hall, H. M. and F. E. Clements. 1923. The phylogenetic method in taxonomy. The North American species_of Artemisia, Chrysothamnus_ and_Atriplex_. Publ. Carnegie Inst. Wash. 326.
• Hall, I. H., K. H. Lee, E. C. Mar, C. O. Starnes andT. G. Waddell. 1977. A proposed mechanism for inhibition of cancer growth by tenulin and helenalin and related cyclopentenones. J. Medicin. Chem.20: 333.
  CAS Google Scholar
• Hansel, R., M. Kartarahardja, J-T. Huang andF. Bohlmann. 1980. Sesquiterpenlacton-β-D-glucopyranoside sowie ein neues Eudesmanolid aus_Taraxacum officinale_. Phytochemistry19: 857.
  Google Scholar
• Harborne, J. B. 1978. Inuleae—chemical review. Page 603_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• —. 1979. Flavonoid pigments. Page 619_in_ G. A. Rosenthal and D. H. Janzen (eds.). Herbivores: Their interaction with secondary plant metabolites. Academic Press, New York.
  Google Scholar
• — andC. A. Williams. 1978. Vernonieae—chemical review. Page 523_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• Harley-Mason, J., A. T. Hewson, O. Kennard and R. C. Pettersen. 1972. Isolation of centaurepensin, a guaianolide sesquiterpene lactone ester containing two chlorine atoms; determination of structure and absolute configuration by X-ray crystallography. Chem. Commun. 460.
• Harmatha, J., Z. Samek, L. Novotny, V. Herout andF. Sôrm. 1969. Terpenes CXC. The structure of adenostylone, isoadenostylone, and neoadenostylone, components of_Adenostyles alliariae_ rhizomes. Coll. Czech. Chem. Comm.34: 1739; Chem. Abstr.71: 39210j (1969).
  CAS Google Scholar
• ——,M. Synackova, L. Novotny, V. Herout andF. Sôrm. 1976. Neutral components of the extract from_Homogyne alpina_ (L.) Cass. Collect. Czech. Chem. Comm.41: 2047.
  CAS Google Scholar
• Hausen, B. M., K. H. Schulz, O. Jarchow, K. H. Klaska andH. Schmalle. 1975. First allergenic sesquiterpene lactone from_Chrysanthemum indicum_. Arteglasin-A. Naturwissenschaften62: 585; Chem. Abstr.84: 57278k (1976).
  CAS Google Scholar
• Hayashi, K., H. Nakamura andH. Mitsuhashi. 1973. Sesquiterpenes from_Cacalia hastata_. Phytochemistry12: 2931.
  CAS Google Scholar
• Hegnauer, R. 1963. The taxonomic significance of alkaloids. Page 389_in_ J. B. Harborne (ed.). Chemical plant taxonomy. Academic Press, New York.
  Google Scholar
• —. 1969. Chemotaxonomie der Pflanzen. Band 1–5. Birkhaüser Verlag, Basel.
  Google Scholar
• Hernández, R., A. Sandoval, A. Setzer andJ. Romo. 1968. Chemical study of_Helenium quadridentata_. Bol. Inst. Quím. Univ. Nac. Autón. México20: 81.
  Google Scholar
• Herout, V. 1970. Chemotaxonomy of the family Compositae (Asteraceae).In H. Wagner and L. Hörhammer (eds.). Pharmacognosy and phytochemistry. Wien. Springer. 1971. Pharmacogn. Phytochem. Int. Congr. 1st., 93 (Publ. 1971).
  Google Scholar
• — andF. Sôrm. 1953. On the components of wormwood (Artemisia absinthium L.) and the isolation of a crystalline pro-chamazulenogen. Collect. Czech. Chem. Comm.18: 854.
  CAS Google Scholar
• ——. 1954. Contribution to the constitution of pro-chamazulenogen, the natural precursor of chamazulene in_Artemisia absinthium_ L. Collect. Czech. Chem. Comm.19: 792.
  CAS Google Scholar
• —,M. Suchy andF. Sôrm. 1961. Isolation and structure of costunolide, balchanolide, isobalchanolide and hydroxybalchanolide, sesquiterpenic lactones of germacrane type from_Artemisia balchanorum_ H. Krasch. Collect. Czech. Chem. Comm.26: 2612.
  Google Scholar
• Herz, W. 1968. Pseudoguaianolides in Compositae. Page 229_in_ T. J. Mabry, R. E. Alston and V. C. Runeckles (eds.). Recent advances in phytochemistry, Vol. 1. Appleton-Century-Crofts, New York.
  Google Scholar
• —. 1973. Pseudoguaianolides in Compositae. Page 153 in Chemistry in botanical classification (Nobel Foundation, Stockholm). Nobel Symposium 25, Academic Press, New York.
  Google Scholar
• —. 1962. Constituents of_Helenium_ species XII. Sesquiterpene lactones of some southwestern species. J. Organ. Chem. (USA)27: 4043.
  CAS Google Scholar
• —. 1977. Biogenetic aspects of sesquiterpene lactone chemistry. Israel J. Chem.16: 32.
  CAS Google Scholar
• —. 1978. Astereae—chemical review. Page 567_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• —. 1978. Sesquiterpene lactones in the Compositae. Page 337_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• —,G. Anderson, S. Gibaja andD. Raulais. 1969. Sesquiterpene lactones of some_Ambrosia_ species. Phytochemistry8: 877.
  CAS Google Scholar
• —,K. Aota andA. Hall. 1970. New pseudoguaianolides from_Hymenoxys_ species. A new type of lactone closure. J. Organ. Chem. (USA)35: 4117.
  CAS Google Scholar
• ——A. L. Hall andA. Srinivasan. 1974. Antileukemic pseudoguaianolides from_Hymenoxys grandiflora_ (T. & G.) Parker. Application of lanthanide-induced shifts to structure determination. J. Organ. Chem. (USA)39: 2013.
  CAS Google Scholar
• ——,M. Holub andZ. Samek. 1970. Sesquiterpene lactones and lactone glycosides from_Hymenoxys_ species. J. Organ. Chem. (USA)35: 2611.
  CAS Google Scholar
• — andS. V. Bhat. 1972. Woodhousin, a new germacranolide from_Bahia woodhousei_ (Gray) Gray. J. Organ. Chem. (USA)37: 906.
  CAS Google Scholar
• —. 1970. Isolation and structure of two new germacranolides from_Polymnia uvedalia_ (L.) L. J. Organ. Chem. (USA)35: 2605.
  CAS Google Scholar
• ——. 1973. Maculatin: An isomer of uvedalin epoxide from_Polymnia maculata_. Phytochemistry12: 1737.
  CAS Google Scholar
• ——,H. Crawford, H. Wagner, G. Maurer andL. Farkas. 1972. Bahifolin, a new sesquiterpene lactone, and 5,7-dihydroxy-3,3’,4’,6-tetramethoxyflavone, a new flavone from_Bahia oppositifolia_. Phytochemistry11: 371.
  CAS Google Scholar
• —— andA. L. Hall. 1970. Parthemollin, a new xanthanolide from_Parthenice mollis_ Gray. J. Organ. Chem. (USA)35: 1110.
  CAS Google Scholar
• —— andS. Poondi Santhanam. 1970. Coumarins of_Artemisia dracunculoides_ and 3’,6-dimethoxy-4’,5,7-trihydroxyflavone in A.arctica. Phytochemistry9: 891.
  CAS Google Scholar
• —— andA. Srinivasan. 1972. Berlandin and subacaulin, two new guaianolides from_Berlandiera subacaulis_. J. Organ. Chem. (USA)37: 2532.
  CAS Google Scholar
• —— andV. Sudarsanam. 1972. Sesquiterpene lactones and flavones of_Iva frutescens_. Phytochemistry11: 1829.
  CAS Google Scholar
• —,H. Chikamatsu, N. Viswanthan andV. Sudarsanam. 1967. Structure of ivalbin, a modified guaianolide from_Iva dealbata_ Gray. J. Organ. Chem. (USA)32: 682.
  CAS Google Scholar
• — andR. DeGroote. 1977. Desacetyleupaserrin and nevadensin from_Helianthus pumilus_. Phytochemistry16: 1307.
  CAS Google Scholar
• ——,R. Murari, N. Kumar andJ. F. Blount. 1979. Sesquiterpene lactones of_Eupatorium serotinum_. J. Organ. Chem. (USA)44: 2784.
  CAS Google Scholar
• ——— andJ. F. Blount. 1978. Sesquiterpene lactones of_Eupatorium recurvans_. J. Organ. Chem. (USA)43: 3559.
  CAS Google Scholar
• —,C. M. Gast andP. S. Subramaniam. 1968. Sesquiterpene lactones of_Helenium alternifolium_ (Spreng.) Cabrera. Structures of brevilin A, linifolin A, and alternilin. J. Organ. Chem. (USA)33: 2780.
  CAS Google Scholar
• — andS. V. Govindan. 1980. Eucannabinolide and other constituents of_Schkuhria virgata_. Phytochemistry19: 1234.
  CAS Google Scholar
• ——,M. W. Bierner andJ. F. Blount. 1980. Sesquiterpene lactones of_Hymenoxys insignis_. X-ray analyses of hymenograndin and hymenosignin. J. Organ. Chem. (USA)45: 493.
  CAS Google Scholar
• —— andJ. F. Blount. 1980.trans, trans-Germacra-l(10),4-dien-cis-6,12olides from_Montanoa hibiscifolia_. J. Organ. Chem. (USA)45: 1113.
  CAS Google Scholar
• ———. 1980. Glycosidic disecoeudesmanolides and other secosesquiterpene lactones from_Picradeniopsis_ species. X-ray analysis of bahia I. J. Organ. Chem. (USA)45: 3163.
  CAS Google Scholar
• ———. 1981. Structures of the rolandrolides and isorolandrolides, unusual germacradienolides from_Rolandra fruticosa_. J. Organ. Chem. (USA)46: 761.
  CAS Google Scholar
• ——, andN. Kumar. 1981. Sesquiterpene lactones and other constituents of_Eupatorium lancifolium_ and_E. semiserratum_. Phytochemistry20: 1343.
  CAS Google Scholar
• — andG. Högnauer. 1962. Ivalin, a new sesquiterpene lactone. J. Organ. Chem. (USA)27: 905.
  CAS Google Scholar
• ——. 1961. Isolation and structure of coronopilin, a new sesquiterpene lactone. J. Organ. Chem. (USA)26: 5011.
  CAS Google Scholar
• —— andA. Romo de Vivar. 1964. Constituents of_Iva_ species. III. Structure of microcephalin, a new sesquiterpene lactone. J. Organ. Chem. (USA)29: 1700.
  CAS Google Scholar
• — andS. Inayama. 1964. Constituents of_Gaillardia_ species. II. Structures of pulchellin B and pulchellin C. Tetrahedron20: 341.
  CAS Google Scholar
• — andP. S. Kalyanaraman. 1975. Mikanokryptin in_Melampodium divaricatum_. Phytochemistry14: 1664.
  CAS Google Scholar
• ——. 1975. Acanthospermal A and acanthospermal B, two new melampolides from_Acanthospermum_ species. J. Organ. Chem. (USA)40: 3486.
  CAS Google Scholar
• ——,G. Ramakrishnan andJ. F. Blount. 1977. Sesquiterpene lactones of_Eupatorium perfoliatum_. J. Organ. Chem. (USA)42: 2264.
  CAS Google Scholar
• —,Y. Kishida andM. V. Lakshmikantham. 1964. Constituents of_Helenium_ species. XVI. Structures of flexuosin A and flexuosin B. Tetrahedron20: 979.
  Google Scholar
• — andN. Kumar. 1979. Sesquiterpene lactones of_Baltimora recta_. Phytochemistry18: 1743.
  CAS Google Scholar
• ——. 1980. Guaianolides from_Liatris squarrosa_. Phytochemistry19: 2387.
  CAS Google Scholar
• ——. 1980. Sesquiterpene lactones of_Calea zacatechichi_ and_C. urticifolia_. Phytochemistry19: 593.
  CAS Google Scholar
• ——. 1981. Heliangolides from_Helianthus maximiliani_. Phytochemistry20: 93.
  CAS Google Scholar
• ——. 1981. Sesquiterpene lactones from_Helianthus grosseserratus_. Phytochemistry20: 99.
  CAS Google Scholar
• ——. 1981. Minor sesquiterpene lactones of_Helianthus pumilus_. Phytochemistry20: 1339.
  CAS Google Scholar
• —— andJ. F. Blount. 1980. A thiol-containing ester sidechain in a sesquiterpene lactone from_Eupatorium mikanioides_. Absolute configuration of desacetyleupasserin and its congeners. J. Organ. Chem. (USA)45: 489.
  CAS Google Scholar
• ———. 1981. Antileukemic C-15 functionalized ambrosanolides from_Rudbeckia mollis_. J. Organ. Chem. (USA)46: 1356.
  CAS Google Scholar
• ——,W. Vichnewski andJ. F. Blount. 1980. Cytotoxic sesquiterpene lactones of_Eremanthus incanus_ and_Heterocoma albida_. Crystal structure and stereochemistry of eregoyazin. J. Organ. Chem. (USA)45: 2503.
  CAS Google Scholar
• — andM. V. Lakshmikantham. 1965. Constituents of_Helenium_ species XVII. Sesquiterpene lactones of_Helenium thurberi_ Gray and the stereochemistry of bigelovin. Tetrahedron21: 1711.
  CAS Google Scholar
• —,R.B. Mitra, K. Rabindran andW. A. Ronde. 1959. Constituents of_Helenium_ species VII. Bitter principles of_H. pinnatifidum_ (Nutt.) Rydb.,H. vernale Walt.,H. brevifolium (Nutt.) A. Wood and_H. flexuosum_ Raf. J. Amer. Chem. Soc.81: 1481.
  CAS Google Scholar
• ——— andN. Viswanathan. 1962. Constituents of_Helenium_ species. XI. The structure of pinnatifidin. J. Organ. Chem. (USA)27: 4041.
  CAS Google Scholar
• -,M. Miyazaki and Y. Kishida. 1961. Structures of parthenin and ambrosin. Tetrahedron Lett. 82.
• —,R. Murari andS. V. Govindan. 1979. Sesquiterpene lactones_of Eupatorium anomalum_ and_Eupatorium mohrii_. Phytochemistry18: 1337.
  CAS Google Scholar
• —,J. Poplawski andR. P. Sharma. 1975. New guaianolides from_Liatris_ species. J. Organ. Chem. (USA)40: 199.
  CAS Google Scholar
• —,S. Rajappa, M. V. Lakshmikantham andJ. J. Schmid. 1966. Constituents of_Gaillardia_ species III. The structure of gaillardilin, a new pseudoguaianolide. Tetrahedron22: 693.
  CAS Google Scholar
• ——,S. K. Roy, J. J. Schmid andR. N. Mirrington. 1966. Constituents of_Gaillardia_ species. IV. The sesquiterpene lactones of_Gaillardia fastigiata_ Greene. Tetrahedron22: 1907.
  CAS Google Scholar
• ——,M. V. Lakshmikantham, D. Raulais andJ. J. Schmid. 1967. Constituents of_Gaillardia_ species. V. Isolation and structure of spathulin. J. Organ. Chem. (USA)32: 1042.
  CAS Google Scholar
• —,D. Raulais andG. D. Anderson. 1973. Sesquiterpene lactones of_Ambrosia cordifolia_. Phytochemistry12: 1415.
  CAS Google Scholar
• —,W. A. Rohde, K. Rabindran, P. Jayaraman andN. Viswanathan. 1962. Revised structure of tenulin. J. Amer. Chem. Soc.84: 3857.
  CAS Google Scholar
• —,A. Romo de Vivar andM. V. Lakshmikantham. 1965. Structure of pseudoivalin, a new guaianolide. J. Organ. Chem. (USA)30: 118.
  CAS Google Scholar
• —,J. Romo andN. Viswanathan. 1963. Constituents of_Helenium_ species. XV. The structure of mexicanin C, relative stereochemistry of its congeners. Tetrahedron19: 1359.
  CAS Google Scholar
• ————. 1963. Constituents of_Helenium_ species XIII. The structure of helenalin and mexicanin A. J. Amer. Chem. Soc.85: 19.
  CAS Google Scholar
• — andS. K. Roy. 1969. New pseudoguaianolides from_Gaillardia pulchella_. Phytochemistry8: 661.
  CAS Google Scholar
• — andP. S. Santhanam. 1967. Virginolide, a new guaianolide from_Helenium virginicum_ Blake. J. Organ. Chem. (USA)32: 507.
  CAS Google Scholar
• ——. 1965. Arbiglovin. A new guaianolide from_Artemisia bigelovii_ Gray. J. Organ. Chem. (USA)30: 4340.
  CAS Google Scholar
• -, -,H. Wagner, R. Höer, L. Hörhammer and L. Farkas. 1969. Isolation, structure and synthesis of 4’,5,6,7-tetrahydroxy-3’-methoxyflavone (batatifolin), a new flavone from_Mikania batatifolia_ DC. Tetrahedron Lett. 3419.
• —, andR. P. Sharma. 1975. A trans-l,2-cis-4,5-germacradienolide and other new germacranolides from_Tithonia_ species. J. Organ. Chem. (USA)40: 3118.
  CAS Google Scholar
• ——. 1975. Complete stereochemistry of tenulin. Carbon-13 nuclear magnetic resonance spectra of tenulin derivatives. J. Organ. Chem. (USA)40: 2557.
  CAS Google Scholar
• ——. 1975. New germacranolides from_Liatris_ species. Phytochemistry14: 1561.
  CAS Google Scholar
• ——. 1975. Seco-germacradienolide from_Liatris pycnostachya_. J. Organ. Chem. (USA)40: 392.
  CAS Google Scholar
• ——. 1976. Pycnolide, a seco-germacradienolide from_Liatris pycnostachya_ and other antitumor constituents of_Liatris_ species. J. Organ. Chem. (USA)41: 1248.
  CAS Google Scholar
• ——. 1976. Sesquiterpene lactones of_Eupatorium hyssopifolium_. A germacranolide with an unusual lipid ester side chain. J. Organ. Chem. (USA)41: 1015.
  CAS Google Scholar
• — andS. Srinivasan. 1974. Reexamination of_Gaillardia amblyodon_. Isolation of new pseudoguaianolides. Phytochemistry13: 1187.
  CAS Google Scholar
• ——. 1972. Pseudoguaianolides of_Gaillardia amblyodon_. Phytochemistry11: 2093.
  CAS Google Scholar
• — andA. Srinivasan. 1974. Stereochemistry of spathulin. Phytochemistry13: 1171.
  CAS Google Scholar
• —— andP. S. Kalyanaraman. 1975. Mikanokryptin, a new guaianolide from_Mikania_. Phytochemistry14: 233.
  CAS Google Scholar
• — andP. S. Subramaniam. 1972. Pseudoguaianolides in_Helenium autumnale_ from Pennsylvania. Phytochemistry11: 1101.
  CAS Google Scholar
• —— andN. Dennis. 1969. Solvent shift studies on pseudoguaianolides of the helenalin series. J. Organ. Chem. (USA)34: 3691.
  CAS Google Scholar
• —— andT. A. Geissman. 1968. 3-epiisotelekin from_Gaillardia aristata_ Pursh. and the structure of farinosin. J. Organ. Chem. (USA)33: 3743.
  CAS Google Scholar
• —— andN. Dennis. 1969. Stereochemistry of flexuosin A and related compounds. J. Organ. Chem. (USA)34: 2915.
  CAS Google Scholar
• ——,R. Murari, N. Dennis andJ. F. Blount. 1977. Microdilin, a complex elemenolide from_Mikania cordifolia_. J. Organ. Chem. (USA)42: 1720.
  CAS Google Scholar
• ——,P. S. Santhanam, K. Aota andA. L. Hall. 1970. Structure elucidation of sesquiterpene dilactones from_Mikania scandens_ (L.) Willd. J. Organ. Chem. (USA)35: 1453. Errata: J. Organ. Chem. (USA)38: 4217 (1973).
  CAS Google Scholar
• — andV. Sudarsanam. 1970. Flavones of_Iva hayesiana_. Phytochemistry9: 895.
  CAS Google Scholar
• —— andJ. J. Schmid. 1966. New guaianolides from_Iva axillaris_ Pursh. ssp.robustior. J. Organ. Chem. (USA)31: 3232.
  CAS Google Scholar
• — andY. Sumi. 1964. Constituents_of Ambrosia hispida_ Pursh. J. Organ. Chem. (USA)29: 3438.
  CAS Google Scholar
• —,V. Sudarsanam andD. Raulais. 1967. Constituents of_Iva_ species. X. Ivangulin, a novel seco-eudesmanolide from_Iva angustifolia_ Nutt. J. Organ. Chem. (USA)32: 3658.
  CAS Google Scholar
• — andK. Ueda. 1961. The sesquiterpene lactones of_Artemisia tilesii_ Ledeb. J. Amer. Chem. Soc.83: 1139.
  CAS Google Scholar
• —— andS. Inayama. 1963. Constituents of_Gaillardia_ species I. The structure of pulchellin. Tetrahedron19: 483.
  CAS Google Scholar
• — andN. Viswanathan. 1964. Constituents of_Iva_ species. II. The structures of asperilin and ivasperin, two new sesquiterpene lactones. J. Organ. Chem. (USA)29: 1022.
  CAS Google Scholar
• — andI. Wahlberg. 1973. Provincialin, a cytotoxic germacradienolide from_Liatris provincialis_ Godfrey with an unusual ester side chain. J. Organ. Chem. (USA)38: 2485.
  CAS Google Scholar
• ——. 1973. Punctatin: A new germacradienolide from_Liatris punctata_. Phytochemistry12: 1421.
  CAS Google Scholar
• ——C. S. Stevens andP. S. Kalyanaraman. 1975. Three new 5,10-epoxygermacranolides from_Liatris chapmanii_ and_Liatris gracilis_. Phytochemistry14: 1803.
  CAS Google Scholar
• —,H. Watanabe, M. Miyazaki andY. Kishida. 1962. The structures of parthenin and ambrosin. J. Amer. Chem. Soc.84: 2601.
  CAS Google Scholar
• Heywood, V. H. 1973. Role of chemistry in plant systematics. Pure Appl. Chem.34: 355; Chem. Abstr.79: 102687c (1973).
  CAS Google Scholar
• — andC. J. Humphries. 1978. Anthemideae—systematic review. Page 851_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Higo, A., Z. Hammam, B. N. Timmermann, H. Yoshioka, J. Lee, T. J. Mabry andW. W. Payne. 1971. Sesquiterpene lactones from the genus_Ambrosia_. Phytochemistry10: 2241.
  CAS Google Scholar
• Hikino, H., D. Kuwano andT. Takemoto. 1968. Structure of_Helenium_ lactone. Chem. Pharm. Bull. Japan16(8): 1601; Chem. Abstr.70: 20233b (1969).
  CAS Google Scholar
• Ho, C. M. andR. Toubiana. 1970. Lactones sesquiterpeniques. Determination de la position du cycle lactonique dans le vernolide et l’hydroxyvernolide. Tetrahedron26: 941.
  CAS Google Scholar
• Hochmannova, J., V. Herout andF. Sôrm. 1961. Isolation and structure of sesquiterpenic lactones from common yarrow (Achillea millefolium L.). Collect. Czech. Chem. Comm.26: 1826.
  CAS Google Scholar
• —,L. Novotny andV. Herout. 1962. Sesquiterpenic hydrocarbons from coltsfoot rhizomes (Petasites officinalis Moench.). Collect. Czech. Chem. Comm.27: 1870.
  CAS Google Scholar
• Hoeneisen, M., M. Sicva andF. Bohlmann. 1980. Sesquiterpene lactones of_Podanthus mitiqui_. Phytochemistry19: 2765.
  CAS Google Scholar
• Hoffman, J. J., S. D. Jolad, S. J. Torrance, D. J. Luzbetak, R. M. Wiedhopf andJ. R. Cole. 1978. Odoratin and paucin: Cytotoxic sesquiterpene lactones from_Baileya pauciradiata_ (Compositae). J. Pharm. Sci.67: 1633.
  Google Scholar
• Holub, M. andV. Herout. 1962. Isolation of desacetoxymatricarin from_Artemisia leucodes_ Schrenk. Collect. Czech. Chem. Comm.27: 2980.
  CAS Google Scholar
• —,M. J. Poplawski, P. Sedmera andV. Herout. 1977. N-ethoxycarbonyl-Lprolinamide, a new alkaloid from the leaves of_Arnica montana_ L. Collect. Czech. Chem. Comm.42: 151.
  CAS Google Scholar
• — andZ. Samek. 1977. Isolation and structure of 3-epinobilin, 1,10-epoxynobilin and 3-dehydronobilin—other sesquiterpenic lactones from the flowers of_Anthemis nobilis_ L. Revision of the structure of nobilin and eucannabinolide. Collect. Czech. Chem. Comm.42: 1053.
  CAS Google Scholar
• —— andJ. Toman. 1972. Carabrone from_Arnica foliosa_. Phytochemistry11: 2627.
  CAS Google Scholar
• Holzer, K. andA. Zinke. 1953. Über die Bitterstoffe der Zichorie (Cichorium intybus L.). Monatssch. Chem.84: 901.
  CAS Google Scholar
• Hörhammer, L., H. Wagner andB. Lay. 1963. New methods in pharmocognosy. VI. Chromatography of_Tussilago farfara_ and_Petasites_ leaves. Deutsch. Apotheker-Zeitung103: 429.
  Google Scholar
• Huber, C. P. and K. J. Watson. 1968. The crystal and molecular structure of 2-bromolumisantonin. J. Chem. Soc. (London) 2441.
• Imakura, Y., K. H. Lee, D. Sims, R.-Y. Wu, I. H. Hall, H. Furukawa, M. Hoigawa andK. Yonaha. 1980. Antitumor agents. XXXVI: Structural elucidation of sesquiterpene lactones, microhelenins A, B, and C, microlenin acetate, and plenolin from_Helenium microcephalum_. J. Pharm. Sci.69: 1044.
  PubMed CAS Google Scholar
• Inayama, S., T. Kawamata andM. Yanagita. 1973. Sesquiterpene lactones of_Gaillardia pulchella_. Phytochemistry12: 1741.
  CAS Google Scholar
• —,T. Okhura, T. Kawamata andM. Yanagita. 1974. Ambrosic acid. New irritant principle from_Ambrosia artemisiifolia_. Chem. Pharm. Bull. (Japan)22: 1435; Chem. Abstr.81: 132853n (1974).
  CAS Google Scholar
• Irie, G. W., D. A. Witzel, W. Herz, R. Kannan, J. O. Norman, D. D. Rushing, J. H. Johnson, L. D. Rowe andJ. A. Veech. 1975. Hymenovin. Major toxic constituents of western bitterweed (Hymenoxys odorata DC). J. Agric. Food Chem.23: 841.
  Google Scholar
• Irwin, M. A.. 1971. Sesquiterpene lactones of_Artemisia_. Ph.D. Dissertation, Univ. of California, Los Angeles; Chem. Abstr.75: 137459z (1971).
  Google Scholar
• — andT. A. Geissman. 1969. Sesquiterpene lactones. Constituents of_Artemisia nova_ Nels. and A.tripartita A. Gray ssp.rupicola. Phytochemistry8: 305.
  CAS Google Scholar
• ——. 1969. Sesquiterpene lactones of_Artemisia_ species. New lactones from_A. arbuscula_ ssp.arbuscula and_A. tripartita_ ssp.rupicola. Phytochemistry8: 2411.
  CAS Google Scholar
• ——. 1971. Sesquiterpene lactones from_Artemisia_: Arbusculin-C, rothin-A and rothin-B. Phytochemistry10: 637.
  CAS Google Scholar
• ——. 1973. Arbusculin-D from_Artemisia arbuscula_ ssp.arbuscula. Phytochemistry12: 853.
  CAS Google Scholar
• ——. 1973. Ridentin-B: An eudesmanolide from_Artemisia tripartita_ spp.rupicola. Phytochemistry12: 871.
  CAS Google Scholar
• ——. 1973. Rupicolin-A, and -B, rupin-A and -B, cumambrin B oxide from_Artemisia tripartita_ ssp.rupicola. Phytochemistry12: 863.
  CAS Google Scholar
• ——. 1973. Novanin: A germacranolide from_Artemisia nova_. Phyxochemistry12: 875.
  CAS Google Scholar
• —,K. H. Lee, R. F. Simpson andT. A. Geissman. 1969. Sesquiterpene lactones of_Artemisia_. Ridentin. Phytochemistry8: 2009.
  CAS Google Scholar
• Ishii, H., T. Tozyo andH. Minato. 1966. Components of the root of_Ligularia fischeri_ Turcz. J. Chem. Soc. C (London)17: 1545.
  Google Scholar
• Ishizaki, Y., Y. Tanahashi, Y. Moriyama, T. Takahashi, andH. Koyama. 1974. Sesquiterpenes from the roots of_Ligularia hodgsonii_. Phytochemistry13: 674.
  CAS Google Scholar
• -, -and T. Takahashi. 1969. Furanoeremophilan-14β,6α-olide, a new furanosesquiterpene lactone from_Ligularia hodgsonii_ Hook. f. The structure and nuclear overhauser effects. Chem. Commun. 551.
• ——— andK. Tori. 1970. The structure of ligularenolide. A new sesquiterpene lactone of eremophilane type. Tetrahedron26: 5387.
  CAS Google Scholar
• Isobe, M., H. Ito, T. Kawai andT. Goto. 1978. Synthesis of sesquiterpene antitumor lactones. A new stereocontrolled total synthesis of (±) vernolepin. J. Amer. Chem. Soc.100: 1940.
  CAS Google Scholar
• Ito, K. andT. Lida. 1981. Seven sesquiterpene lactones from_Inula britannica_ var.chinensis. Phytochemistry20: 271.
  CAS Google Scholar
• Jackson, R. C. 1960. A revision of the genus_Iva_ L. Univ. Kansas Sci. Bull.41: 793.
  Google Scholar
• Jain, T. C. and J. E. McCloskey. 1971. Bromotrifluoride catalyzed cyclization of costunolide. Synthesis of 4α-hydroxycyclocostulinolide. Tetrahedron Lett. 1415.
• Jamieson, G. R., E. H. Reid, B. P. Turner andA. T. Jamieson. 1976. BakkenolideA. Its distribution in_Petasites_ species and cytotoxic properties. Phytochemistry15: 1713.
  CAS Google Scholar
• Jeffrey, C. 1979. Generic and sectional limits in_Senecio_ (Compositae). II. Evaluation of some recent studies. Kew Bulletin34: 49.
  Google Scholar
• —,P. Halliday, M. Wilmot-Dear andS. W. Jones. 1977. Generic and sectional limits in_Senecio_ (Compositae): I. Progress Report. Kew Bull.32: 47.
  Google Scholar
• Jennings, P., S. Reeder, J. Hurley, C. Caughlan, G. D. Smith. 1974. Isolation and structure determination of one of the toxic constituents from_Tetrahymena glabrata_. J. Organ. Chem. (USA)39: 3392.
  CAS Google Scholar
• Jeremic, D., A. Jokic, A. Behbud and M. Stefanovic. 1973. A new type of sesquiterpene lactone isolated from_Artemisia annua_ L. Tetrahedron Lett. 3039.
• Jizba, J., Z. Samek, L. Novotny, E. Najdenova andA. Boeva. 1978. Components of_Senecio nemorensis_ var.bulgaricus (Vel. Pro. Sp.). Collect. Czech. Chem. Commun.43: 1113.
  CAS Google Scholar
• Jones, D. A. 1972. Cyanogenic glycosides and their function. Page 103_in_ J. B. Harborne (ed.). Phytochemical ecology. Academic Press, London and New York.
  Google Scholar
• Jones, S. B. 1978. Vernonieae—systematic review. Page 503_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• Joseph-Nathan, P. andJ. Romo. 1966. Isolation and structure of peruvin. Tetrahedron22: 1723.
  Google Scholar
• Joshi, B. S., A. S. Bawdekar, G. H. Kulkarni, A. S. Rao, G. R. Kelkar andS. C. Bhattacharyya. 1961. Examination of_Costus_ root oil. Perfumery Essent. Oil Record52: 773; Chem. Abstr.56: 11727d (1962).
  CAS Google Scholar
• — andV. N. Kamat. 1972. Structure of enhydrin, a germacranolide from_Enhydra fluctuons_ Lour. Ind. J. Chem.10: 771.
  CAS Google Scholar
• —,G. H. Kulkarni, G. R. Kelkar andS. C. Bhattacharyya. 1966. Transformation products of costunolide. Stereochemistry of (-) santonin and solid dihydrocostunolide at C-11. Tetrahedron22: 2331.
  CAS Google Scholar
• Kagan, H. B., H. E. Miller, W. Renold, M. V. Lakshmikantham, L. R. Tether, W. Herz andT. J. Mabry. 1966. The structure of psilostachyin C, a new sesquiterpene dilactone from_Ambrosia psilostachya_ DC. J. Organ. Chem. (USA)31: 1629.
  CAS Google Scholar
• Kallen, J. 1873. Über Helenin und Alantkampher. Ber. Dtsch. Chem. Ges.6: 1506.
  Google Scholar
• Kaneko, H., S. Naruto andS. Takahashi. 1971. Sesquiterpenes of_Achillea sibirica_. Phytochemistry10: 3305.
  CAS Google Scholar
• Karawya, M. S., S. H. Hilal, M. S. Hifnawy andS. E. El-Hawary. 1977. Isolation and preliminary pharmacological and microbiological screening of cnicin from_Centaurea calitrapa_ L. growing in Egypt. Egypt. J. Pharm. Sci.16: 445; Chem. Abstr.89: 160096b (1978).
  Google Scholar
• Kariyone, T., T. Fukui, M. Ishikawa andT. Imawaki. 1949. Constituents of_Artemisia monogyna_. Structure of mibulactone. J. Pharmac. Soc. Japan69: 310.
  CAS Google Scholar
• — andS. Naito. 1955. Components of_Carpesium abrotanoides_. Chemical structure of_Carpesia_ lactone. J. Pharm. Soc. Japan75: 39; Chem. Abstr.50: 890g (1956).
  CAS Google Scholar
• —— andJ. Chatani. 1954. Studies on the components of_Carpesium abrotanoides_. Chemical constitution of_carpesia_ lactone. Pharm. Bull. (Japan)2: 339; Chem. Abstr.50: 7089g (1956).
  CAS Google Scholar
• Karrer, W. 1958. Konstitution und Vorkommen der Organischen Pflanzenstoffe. Birkhauser Verlag, Basel.
  Google Scholar
• Kashman, Y., D. Lavie andE. Glotter. 1967. Sesquiterpene lactones from_Inula helenium_. Israel J. Chem.5: 23.
  CAS Google Scholar
• Kasymov, Sh. Z. andG. P. Sidyakin. 1972. Lactones of_Achillea millefolium_. Khim. Prir. Soedin.8: 246; English ed. p. 246.
  Google Scholar
• ——. 1969. Lactones from_Artemisia tenuisecta_. Khim. Prir. Soedin.5: 445; Chem. Abstr.72: 75666s (1970).
  CAS Google Scholar
• -,M. I. Yusupov, S. Kh. Zakirov, G. P. Sidyakin and D. Tezisy. 1978. Structure of novel guaianolides of jurmolide and ayanin. Sov. Indiiskii Simp., Khim. Prir. Soedin. 5th 37 (Russ.) Izv. Biol. Nauki. SSR: Yerevan, USSR; Chem. Abstr. 93: 186586u (1980).
• Kato, T., K. Shirahata and Y. Kitahara. 1969. Mass spectra of bakkenolides and their derivatives. Recent Develop. Mass. Spectrosc. Proc. Int. Conf. Mass. Spectrosc. 1259; Chem. Abstr.75: 110446f (1971).
• Kawatani, T. andT. Takeuchi. 1954. Two crystalline compounds from_Artemisia finita_; further discovery of an_Artemisia_ containing 1-β-santonin. J. Pharm. Soc. Japan74: 793; Chem. Abstr.49: 11607f (1955).
  CAS Google Scholar
• Kechatova, N. A., K. S. Rybalko, P. N. Smirnov andM. I. Kamnev. 1969. Tauremisin content_of Artemisia taurica_. Tauremisin distribution in the organs. Rast. Resur.5: 444; Chem. Abstr.72: 39786x (1970).
  CAS Google Scholar
• — andM. I. Vlasov. 1966. Sesquiterpene lactone from_Artemisia juncea_. Khim. Prir. Soedin., Akad. Nauk, CK. SSR2: 216; Chem. Abstr.65: 17360e (1966).
  CAS Google Scholar
• Keck, D. D. 1946. A revision of the_Artemisia vulgaris_ complex in North America. Proc. Calif. Acad. Sci. IV Series25(17): 421.
  Google Scholar
• Kelsey, R. G. 1974. The systematic usefulness of the sesquiterpene lactones in the genus_Artemisia_, section_Tridentatae_ (sagebrush) of Montana. Doctoral thesis. Univ. of Montana.
• —,M. S. Morris, N. R. Bhadane andF. Shafizadeh. 1973. Sesquiterpene lactones_of Artemisia_: TLC analysis and taxonomic significance. Phytochemistry12: 1345.
  CAS Google Scholar
• — andF. Shafizadeh. 1979. Sesquiterpene lactones and systematics of the genus_Artemisia_. Phytochemistry18: 1591.
  CAS Google Scholar
• —,J. W. Thomas, T. J. Watson andF. Shafizadeh. 1975. Population studies in_Artemisia tridentata_ ssp.vaseyana: Chromosome numbers and sesquiterpene lactone races. Biochem. System. Ecol.3: 209.
  CAS Google Scholar
• Kerimov, S. S. andO. S. Chizhov. 1974. Sesquiterpene lactones of_Inula helenium_. Khim. Prir. Soedin.10: 254; Chem. Abstr.81: 60894b (1974).
  CAS Google Scholar
• Khafagy, S. M., S. A. Gharbo andT. M. Sarg. 1971. Phytochemical investigations of_Artemisia herba-alba_. Pl. Med.20: 90.
  CAS Google Scholar
• — andA. Metwally. 1970. Isolation of a crystalline sesquiterpenic ketolactone from_Xanthium occidentale_. Pl. Med.18: 318; Chem. Abstr.73: 95439u (1970).
  CAS Google Scholar
• Khvorost, P. P. andN. F. Komissarenko. 1976. Lactones of_Inula helenium_. Khim. Prir. Soedin.12: 820; Chem. Abstr.86: 136307p (1978).
  Google Scholar
• Kiang, A. K., K. Y. Sim andS. W. Young. 1968. Constituents of_Mikania cordata_ (Burm. F.) B. L. Robinson (Compositae) II. Phytochemistry7: 1035.
  CAS Google Scholar
• Kim, H. L., L. D. Rowe andB. J. Camp. 1975. Hymenoxon, a poisonous sesquiterpene lactone from_Hymenoxys odorata_ (bitterweed). Res. Comm. Chem. Pathol. Pharmacol.11: 647; Chem. Abstr.83: 160803f (1975).
  CAS Google Scholar
• Kingston, D., M. Rao, T. Spittler, R. Pettersen andD. Cullen. 1975. Sesquiterpenes from_Fluorensia cernua_. Phytochemistry14: 2033.
  CAS Google Scholar
• Kiseleva, E. Y., V. I. Sheichenko, K. S. Rybalko, G. A. Kalabin andA. I. Ban’kovskii. 1971. The structure of inulicin—a new sesquiterpene lactone from_Inula japonica_. Khim. Prir. Soedin.7: 263; English ed. p. 254; Chem. Abstr.75: 110445e (1971).
  CAS Google Scholar
• ———,A. I. Shretev andD. Pakaln. 1969. Separation of gaillardin from_Inula oculus_ Christi. Khim. Prir. Soedin.5: 444; Chem. Abstr.72: 82893s (1970).
  CAS Google Scholar
• Kisiel, W. 1975. Phytochemical investigation of_Vernonia flexuosa_. Vernoflexuoside and vernoflexin, new sesquiterpene lactones. Pol. J. Pharmacol. Pharm.27: 461; Chem. Abstr.84: 14634f (1976).
  PubMed CAS Google Scholar
• —. 1978. New germacranolide from_Zinnia haageana_. Phytochemistry17: 1059.
  CAS Google Scholar
• Klimash, J. W. andN. H. Fischer. 1981. Four new cis,cis-germacranolides from cytotoxic fractions of_Melampodium cinereum_. Phytochemistry20: 840.
  CAS Google Scholar
• Kondo, Y., F. Hamada and F. Yoshizaki. 1976. 2-methoxydihydrohelenalin from the rhizome of Sendai_Helenium autumnale_ L. Heterocycles 373; Chem. Abstr. 86: 90060x (1977).
• -,T. Tomimori, N. Hiraga and T. Takemoto. 1977. Picrohelenin, a new cytotoxic and bitter pseudoguaianolide from Sendai_Helenium autumnale_ L. Heterocycles 19; Chem. Abstr.86: 68371c (1977).
• -,F. Yoshizaki, F. Hamada, J. Imai and G. Kusano. 1977. Sulferalin, a novel sulfonyl pseudoguaianolide sesquiterpene lactone from Sendai_Helenium autumnale_ L. Tetrahedron Lett. 2155.
• Konovalova, O. A., K. S. Rybalko andV. S. Kabanov. 1972. Sesquiterpene lactones from_Carpesium eximium_. Khim. Prir. Soedin.8: 721;English ed. p. 705; Chem. Abstr.78: 94805b (1973).
  Google Scholar
• --and M. G. Pimenov. 1979. Sesquiterpene lactone from_Saussurea amara_. Khim. Prir. Soedin. 865; Chem. Abstr.93: 22593t (1980).
• —— andV. I. Sheichenko. 1974. Structure of new sesquiterpene lactones from_Inula germanica_. Khim. Prir. Soedin.10: 578;English ed. p. 591; Chem. Abstr.82: 73219f (1975).
  Google Scholar
• ——— andD. A. Pakaln. 1971. Sesquiterpene lactones from_Artemisia caucasica_. Khim. Prir. Soedin.7: 741; English ed. p. 719; Chem. Abstr. 76: 141061b (1972).
  CAS Google Scholar
• Kovacs, Ö., V. Herout, M. Horak andF. Sôrm. 1956. On terpenes. LXVII. Hydrogenation products of santonin and alantolactone. Collect. Czech. Chem. Comm.21: 225.
  CAS Google Scholar
• Kozuka, M., K. H. Lee, A. T. McPhail andK. D. Onan. 1975. Structure and absolute stereochemistry of dihydroflorilenalin, a new sesquiterpene lactone from Florida_Helenium autumnale_. Chem. Pharm. Bull.23: 1895.
  CAS Google Scholar
• Kupchan, S. M. 1975. Advances in the chemistry of tumor-inhibitory natural products. Page 167_in_ V. C. Runeckles (ed.). Recent advances in phytochemistry. Vol. 9. Plenum Press, New York.
  Google Scholar
• —,J. W. Ashmore andA. T. Sneden. 1977. Eriofertopin and 2-O-acetyleriofertopin, a new tumor inhibitory germacradienolide from_Eriophyllum confertiflorum_. Phytochemistry16: 1834.
  CAS Google Scholar
• —,Y. Aynechi, J. M. Cassady, H. K. Schnoes andA. L. Burlingame. 1969. Tumor inhibitors XL. The isolation and structural elucidation of elephantin and elephantopin, two novel sesquiterpenoid tumor inhibitors from_Elephantopus elatus_. J. Organ. Chem. (USA)34: 3867.
  CAS Google Scholar
• -,R. L. Baxter, C-K. Chiang, C. J. Gilmore and R. F. Bryan. 1973. Eriolangin and eriolanin, novel antileukemic secoeudesmanolides from_Eriophyllum lanatum_. Chem. Commun. 842.
• —,J. M. Cassady, J. E. Kelsey, H. K. Schones, D. H. Smith andA. L. Burlingame. 1966. Structural elucidation and high resolution mass spectrometry of gaillardin, a new cytotoxic sesquiterpene lactone. J. Amer. Chem. Soc.88: 5292.
  CAS Google Scholar
• —,V. H. Davies, T. Fujita, M. R. Cox andR. F. Bryan. 1971. Liatrin, a novel antileukemic sesquiterpene lactone from_Liatris chapmanii_. J. Amer. Chem. Soc.93: 4916.
  CAS Google Scholar
• ————,R. J. Restivo andR. F. Bryan. 1973. The isolation and structural elucidation of liatrin, a novel antileukemic sesquiterpene lactone from_Liatris chapmanii_. J. Organ. Chem. (USA)38: 1853.
  CAS Google Scholar
• —,T. Fujita, M. Maruyama andR. W. Britton. 1973. The isolation and structure elucidation of eupaserrin and desacetyleupaserrin, new antileukemic sesquiterpene lactones from_Eupatorium semiserratum_. J. Organ. Chem. (USA)38: 1260.
  CAS Google Scholar
• —,R. J. Hemingway, A. Karim andD. Werner. 1969. Vernodalin and vernomygdin, two new cytotoxic sesquiterpene lactones from_Vernonia amygdalina_ Del. J. Organ. Chem. (USA)34: 3908.
  CAS Google Scholar
• ——D. Werner andA. Karim. 1969. Vernolepin, a novel sesquiterpene dilactone tumor inhibitor from_Vernonia hymenolepis_ A. Rich. J. Organ. Chem. (USA)34: 3903.
  CAS Google Scholar
• ————,A. T. McPhail andG. A. Sim. 1968. Vernolepin, a novel elemanolide dilactone tumor inhibitor from_Vernonia hymenolepis_. J. Amer. Chem. Soc.90: 3596.
  CAS Google Scholar
• —,J. E. Kelsey, M. Maruyama, J. M. Cassady, J. C. Hemingway andJ. R. Knox. 1969. Tumor inhibitors XLI. Structural elucidation of tumor-inhibitory sesquiterpene lactones from_Eupatorium rotundifolium_. J. Organ. Chem. (USA)34: 3876.
  CAS Google Scholar
• —,M. Maruyama, R. J. Hemingway, J. C. Hemingway, S. Shibuya andT. Fujita. 1973. Structural elucidation of novel tumor-inhibitory sesquiterpene lactones from_Eupatorium cuneifolium_. J. Organ. Chem. (USA)38: 2189.
  CAS Google Scholar
• ——————,P. D. Cradwick, A. D. Hardy andG. A. Sim. 1971. Eupacunin, a novel antileukemic sesquiterpene lactone from_Eupatorium cuneifolium_. J. Amer. Chem. Soc.93: 4914.
  CAS Google Scholar
• Kurokawa, T., K. Nakanishi, W. Wu, H. Y. Hsu, M. Maruyama and S. M. Kupchan. 1970. Deoxyelephantopin and its interrelation with elephantopin. Tetrahedron Lett. 2863.
• Lee, K. H., D. C. Anuforo, E. S. Huang andC. Piantadosi. 1972. Angustibalin, a new cytotoxic sesquiterpene from_Balduina angustifolia_. J. Pharm. Sci.61: 626; Chem. Abstr.77: 28809j (1972).
  PubMed CAS Google Scholar
• -,H. Furukawa, M. Kozuka, H. C. Huang, P. A. Luhan and A. T. McPhail. 1973. Molephantin, a novel cytotoxic germacranolide from_Elephantopus mollis_. Xray crystal structure. Chem. Commun. 476.
• — andT. A. Geissman. 1970. Sesquiterpene lactones of_Artemisia_. Constituents of A.ludoviciana ssp.mexicana. Phytochemistry9: 403.
  CAS Google Scholar
• ——. 1971. Sesquiterpene lactones of_Artemisia_ species. Artefransin from_A. franserioides_. Phytochemistry10: 205.
  CAS Google Scholar
• —,M. Haruna, H. C. Huang, B. S. Wu andI. H. Hall. 1977. Helenalin, an antitumor principle from_Anaphalis morrisonicola_ Hay. J. Pharm. Sci.66: 1194; Chem. Abstr.87: 145893s.
  PubMed CAS Google Scholar
• —,H. C. Huang, E. S. Huang andH. Furukawa. 1972. Eupatolide, a new cytotoxic principle from_Eupatorium formosanum_. J. Pharm. Sci.61: 629; Chem. Abstr.77: 28810c (1972).
  PubMed CAS Google Scholar
• —,T. Ibuka, H. Furukawa, M. Kozuka, R-Y. Wu, I. H. Hall andH-C. Huang. 1980. Antitumor agents. XXXVIII. Isolation and structural elucidation of novel germacranolides and triterpenes from_Elephantopus mollis_. J. Pharm. Sci.69: 1050.
  PubMed CAS Google Scholar
• ——H-C. Huang andD. L. Harris. 1975. Molephantinin, a new potent antitumor sesquiterpene lactone from_Elephantopus mollis_. J. Pharm. Sci.64: 1077; Chem. Abstr.83: 172545 (1975).
  PubMed CAS Google Scholar
• -, -,M. Kozuka, A. T. McPhail and K. D. Onan. 1974. The structure and absolute configuration of florilenalin, a new cytotoxic guaianolide from Florida_Helenium autumnale_ L. Tetrahedron Lett. 2287.
• -, -,A. T. McPhail, K. D. Onan, T. A. Geissman and T. G. Waddell. 1974. The structure and absolute configuration of plenolin, a cytotoxic sesquiterpene lactone. Tetrahedron Lett. 1149.
• —,Y. Imakura andD. Sims. 1976. Structure and stereochemistry of microhelenin-A, a new antitumor sesquiterpene lactone from_Helenium microcephalum_. J. Pharm. Sci.65: 1410.
  PubMed CAS Google Scholar
• -,-,-,A. T. McPhail and K. D. Onan. 1976. Structure and stereochemistry of microlenin, a novel antitumor dimeric sesquiterpene lactone from_Helenium microcephalum_; X-ray crystal structure. Chem. Commun. 341.
• —————. 1977. Antitumor sesquiterpene lactones from_Helenium microcephalum_: Isolation of mexicanin-E and structural characterization of microhelenin-B and -C. Phytochemistry16: 393.
  CAS Google Scholar
• —,T. Kimura, M. Haruna, A. T. McPhail, K. D. Onan andH-C. Huang. 1977. Structure and stereochemistry of eupaformosanin, a new antileukemic and antisarcoma germacranolide from_Eupatorium formosanum_. Phytochemistry16: 1068.
  CAS Google Scholar
• -, -,M. Okamoto, C. M. Cowherd, A. T. McPhail and K. D. Onan. 1976. The structure and stereochemistry of eupahyssopin, a new antitumor germacranolide from_Eupatorium hyssopifolium_. Tetrahedron Lett. 1051.
• —,S. Matsueda andT. A. Geissman. 1971. Sesquiterpene lactones of_Artemisia_. New guaianolides from fall growth of A.douglasiana. Phytochemistry10: 405.
  CAS Google Scholar
• —,R. F. Simpson andT. A. Geissman. 1969. Sesquiterpenoid lactones of_Artemisia_. Constituents_of Artemisia cana_ ssp.cana. The structure of canin. Phytochemistry8: 1515.
  CAS Google Scholar
• Lessing, C. F. 1832. “Synopsis generum Compositarum.” Berolini (1832).
• LeVan, N. andN. H. Fischer. 1979. Three new melampolide sesquiterpenes. Polymatin A, B and C, from_Polymnia maculata_ Cav. var.maculata. Phytochemistry18: 851.
  Google Scholar
• Levin, D. C. 1979. The nature of plant species. Science204: 381.
  PubMed CAS Google Scholar
• Levy, M. 1977. Minimum biosynthetic step indices as measures of comparative flavonoid affinity. Sys. Bot.2: 89.
  CAS Google Scholar
• L’Homme, M. F., T. A. Geissman, H. Yoshioka, T. H. Porter, W. Renold and T. J. Mabry. 1969. The structure of chamissonin. Tetrahedron Lett. 3161.
• Lincoln, D. E. andJ. H. Langenheim. 1979. Variation of_Satureja douglasii_ monoterpenoids in relation to light intensity and herbivory. Biochem. System. Ecol.7: 289.
  CAS Google Scholar
• Lucas, R. A., S. Rovinski, R. J. Kiesel, L. Dorfman andH. B. MacPhillamy. 1964. A new sesquiterpene lactone with analgesic activity from_Helenium amarum_. J. Organ. Chem. (USA)29: 1549.
  CAS Google Scholar
• —,R. G. Smith andL. Dorfman. 1964. The isolation of dihydromexicanin-E from_Helenium autumnale_ L. J. Organ. Chem. (USA)29: 2101.
  CAS Google Scholar
• Lugovskaya, S. A., N. V. Plekhanova, and K. Y. Orovbaev. 1976. Alantolactone from_Inula grandis_. Khim. Prir. Soedin 110.
• -,-,-. 1976. Alantolactone and isoalantolactone from_Inula grandis_ Schrenk. Izv. Akad. Nauk, Kirg. SSR. 54; Chem. Abstr.86: 167866z (1977).
• Mabry, T. J. 1972. Infraspecific variation of sesquiterpene lactones in_Ambrosia_ (Compositae): Applications to evolutionary problems at the populational level. Phytochemical phytogeny. Proc. Phytochem. Soc. Symp.1969: 269.
  Google Scholar
• — andF. Bohlmann. 1978. Summary of the chemistry of the Compositae. Page 1097_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• —,Z. Abdel-Baset, W. G. Padolina andS. B. Jones. 1975. Systematic implications of flavonoids and sesquiterpene lactones in species of_Vernonia_. Biochem. System. Ecol.2: 185.
  CAS Google Scholar
• See Reference No. 596, Literature Cited.
• — andJ. E. Gill. 1979. Sesquiterpene lactones and other terpenoids. Pages 601_in_ G. A. Rosenthal and D. H. Janzen (eds.). Herbivores: Their interaction with secondary plant metabolites. Academic Press, New York.
  Google Scholar
• —,H. B. Kagan andH. E. Miller. 1966. Psilostachyin B, a new sesquiterpene dilactone from_Ambrosia psilostachya_ DC. Tetrahedron22: 1943.
  CAS Google Scholar
• —,H. E. Miller, H. B. Kagan andW. Renold. 1966. The structure of psilostachyin, a new sesquiterpene dilactone from_Ambrosia psilostachya_. Tetrahedron22: 1139.
  CAS Google Scholar
• —,W. Renold, H. E. Miller andH. B. Kagan. 1966. The structure of ambrosiol. A new sesquiterpene lactone from_Ambrosia psilostachya_. J. Organ. Chem. (USA)31: 681.
  CAS Google Scholar
• Mahmoud, Z., N. A. Abdel Salam, T. M. Sarg andF. Bohlmann. 1981. A carotane derivative and a eudesmanolide from_Inula crithmoides_. Phytochemistry20: 735.
  CAS Google Scholar
• Manchand, P. S. andJ. F. Blount. 1978. Stereostructures of neurolensins A and B, novel germacranolide sesquiterpenes from_Neurolaena lobata_ (L.) R. Br. J. Organ. Chem. (USA)43: 4352.
  CAS Google Scholar
• Maruyama, M. andS. Omura. 1977. Carpesiolin from_Carpesium abrotanoides_. Phytochemistry16: 782.
  CAS Google Scholar
• — andF. Shibata. 1975. Stereochemistry of granilin isolated from_Carpesium abrotanoides_. Phytochemistry14: 2247.
  CAS Google Scholar
• Mathur, S. B. 1972. Composition of Punjab_Costus_ root oil. Phytochemistry11: 449.
  CAS Google Scholar
• — andC. M. Fermín. 1973. Terpenes of_Mikania mongenansis_. Phytochemistry12: 226.
  CAS Google Scholar
• —,P. García Tello, C. Marcano Fermín andV. Mora-Arellano. 1975. Terpenoids_of Mikania monagasensis_ and their biological activities. Rev. Latinoamer. Quím.6: 201.
  CAS Google Scholar
• —,S. V. Hiremath, G. H. Kulkarni, G. R. Kelkar andS. C. Bhattacharyya. 1965. Terpenoids—LXX. Structure of dehydrocostus lactone. Tetrahedron21: 3575.
  CAS Google Scholar
• Matsueda, S. and T. A. Geissman. 1967. Sesquiterpene lactones of_Artemisia_ species. HI. Arglanine from_Artemisia douglasiana_ Bess. Tetrahedron Lett. 2013.
• -, and -. 1967. Sesquiterpene lactones_of Artemisia_ species. IV. Douglanine from_Artemisia douglasiana_ Bess. Tetrahedron Lett. 2159.
• -,M. Nagaki, J. Ichita, Y. Masuchi and M. Koreeda. 1979. Structure of meridianone. Abstract Book, ACS-CSJ Chemical Congress, Honolulu. Organic Chemistry Paper 571.
• —,S. Sato andY. Satomi. 1973. Sesquiterpene lactones IX. Seasonal variation of chemical constitution of_Artemisia feddei_ collected in Kochi Prefecture. J. Pharm. Soc. Japan93: 922; Chem. Abstr.79: 75928y (1973).
  Google Scholar
• Mazur, Y. and A. Meisels. 1956. The structure of arborescine, a new sesquiterpene from_Artemisia arborescens_ L. Chem. Ind. 492.
• McMillan, C, P. I. Chávez andT. J. Mabry. 1975. Sesquiterpene lactones of_Xanthium strumarium_ in a Texas population and in experimental hybrids. Biochem. Syst. Ecol.3: 137; Chem. Abstr.84: 56625j (1976).
  CAS Google Scholar
• ——,S. G. Plettman andT. J. Mabry. 1975. Systematic implications of the sesquiterpene lactones in the “strumarium” morphological complex (Xanthium strumarium, Asteraceae) of Europe, Asia and Africa. Biochem. System. Ecol.2: 181.
  CAS Google Scholar
• McPhail, A. T., P. A. Luhan, K. H. Lee, H. Furukawa, R. Meck, C. Piantadosi and T. Shingu. 1973. Crystal structure of carolenalin monoacetate: Revision of the stereochemistry of carolenalin and carolenin. Tetrahedron Lett. 4087.
• -,R. W. Miller, B. Mompon and R. Toubiana. 1975. Structure and stereochemistry of vernodesmine, a novel phenyl bearing sesquiterpene lactone from_Vernonia pectoralis_ Baker. Tetrahedron Lett. 3675.
• — andK. D. Onan. 1976. Crystal and molecular structure of carolenalone, a cycloheptenone sesquiterpene lactone from North Carolina_Helenium autumnale_ L. J. Chem. Soc. Perkin Trans.II: 332.
  Google Scholar
• -, -,H. Furukawa and K. H. Lee. 1975. Structure and stereochemistry of carolenalone, a new sesquiterpene lactone from North Carolina_Helenium autumnale_ L. Tetrahedron Lett. 1229.
• -, -,K. H. Lee, T. Ibuka, and H. Ch. Huang. 1974. Structure and stereochemistry of eupaformonin, a novel cytotoxic sesquiterpene lactone from_Eupatorium formosanum_ Hay. Tetrahedron Lett. 3203.
• -, -, -, -,M. Kozuka, T. Shingu and H. C. Huang. 1974. Structure and stereochemistry of the epoxide of phantomolin, a novel cytotoxic sesquiterpene lactone from_Elephantopus mollis_. Tetrahedron Lett. 2739.
• — andG. Sim. 1972. Constitution and absolute stereochemistry of elephantol: X-ray analysis of elephantol p-bromobenzoate. J. Chem. Soc. Perkin Trans.2: 1313.
  Google Scholar
• Mears, J. A. 1980. Chemistry of polyploids. A summary with comments on_Parthenium_ (Asteraceae-Ambrosiinae). Page 77_in_ W. H. Lewis (ed.). Polyploidy—biological relevance. Plenum Press, New York.
  Google Scholar
• Mehra, M. M., K. G. Deshpande, B. B. Ghatge andS. C. Bhattacharyya. 1967. Transformation products of alantolactones. Tetrahedron23: 2469.
  CAS Google Scholar
• Miller, H. E. andT. J. Mabry. 1967. 3-hydroxydamsin, a new pseudoguaianolide from_Ambrosia psilostachya_ (Compositae). J. Organ. Chem.32: 2929.
  CAS Google Scholar
• ——,B. L. Turner andW. W. Payne. 1968. Infraspecific variation of sesquiterpene lactones in_Ambrosia psilostachya_ (Compositae). Amer. J. Bot.55: 316.
  CAS Google Scholar
• Minato, H. and I. Horibe. 1965. Structure and stereochemistry of xanthumin, a stereoisomer of xanthinin. J. Chem. Soc. (London), 7009.
• -,S. Nosaka and I. Horibe. 1964. The structure of carabrone, a new component of_Carpeslum abrotanoides_. Linn. J. Chem. Soc. (London), 5503.
• Mitchell, D. R. andR. O. Asplund. 1973. Pulchellins C and E in_Gaillardia aristata_. Phytochemistry12: 2541.
  CAS Google Scholar
• Mnatsakanyan, V. A. and L. V. Revazova. 1974. Tamarine from_Tanacetum chiliophyllum_. Khim. Prir. Soedin. 396: Chem. Abstr.82: 13988w (1975).
• ——. 1974. Phytochemical analysis of_Tanacetum myriocophyllum_. II. Structure of tanamyrin. Arm. Khim. Zh.27: 208; Chem. Abstr.81: 91747k (1974).
  CAS Google Scholar
• ——. 1973. Phytochemical analysis of the plant_Tanacetum myriophyllum_. I. Sesquiterpenic lactones. Arm. Khim. Zh.26: 914; Chem. Abstr. 80: 121134g (1974).
  CAS Google Scholar
• Moiseeva, G. P., B. Akyev, S. Z. Kasymov andG. P. Sidyakin. 1973. The structure of the lactones arsanin and arsantin. Khim. Prir. Soedin.9: 167; English ed. p. 162; Chem. Abstr.79: 5470u (1973).
  Google Scholar
• Mompon, B., C. M. Ho andR. Toubiana. 1973. Sur la structure du pectorolide, nouvelle lactone sesquiterpenique isolée du_Vernonia pectoralis_ Baker. Compt. Rend. Hebd. Séances Acad. Sci. Series C.276: 1799; Chem. Abstr.79: 105430z (1973).
  CAS Google Scholar
• —,G. Massiot andR. Toubiana. 1974. Structure of subluteolide, a new guaianolide isolated from_Vernonia sublutea_ (Compositae). Compt. Rend. Hebd. Séances Acad. Sci. Ser. C.279: 907; Chem. Abstr.82: 171223x (1975).
  CAS Google Scholar
• — andR. Toubiana. 1976. Lactones sesquiterpeniques du_Vernonia pectoralis_ Baker (Comp.). Stereochimie du pectorolide, et structure des vernopectolides-A et B. Tetrahedron32: 2545.
  CAS Google Scholar
• Morimoto, H., Y. Sanno andH. Oshio. 1966. Chemical studies on heliangine. A new sesquiterpene lactone isolated from the leaves of_Helianthus tuberosus_ L. Tetrahedron22: 3173.
  CAS Google Scholar
• Morishita, H., S. Nakano, I. Satoda and T. Fukui. 1959. Extraction of santonin from a new plant [pentaploid hybrid:Artemisia maritima ssp.monogyna x_A. lercheana_ var._dahurica_]. Japan 2296; Chem. Abstr.53: 20707g.
• -, -, -,and -. 1959. Extraction of santonin with bicarbonate. Japan 2646; Chem. Abstr.53: 18981d (1959).
• Moriyama, Y. and T. Takahashi. 1976. New sesquiterpene lactones of the eremophilane type from_Ligularia fauriei_ (Fr.) Koidz. Bull. Chem. Soc. Japan, 3196; Chem. Abstr.86: 140267t (1977).
• ——. 1976. New eremophilane-type lactones from_Ligularia fauriei_ (Fr.) Koidz. Chem. Pharm. Bull.24: 360; Chem. Abstr.84: 147721d (1976).
  CAS Google Scholar
• Mukhametzhanov, M. N., A. I. Shreter andD. Pakalns. 1969. Stizolycin from_Centaurea solstitialis_. Khim. Prir. Soedin.5: 590; Chem. Abstr.73: 73825q (1970).
  CAS Google Scholar
• Nagano, H., Y. Moriyama, Y. Tanahashi andT. Takahashi. 1974. New benzofuranosesquiterpenes from_Farfugiumjaponicum_. Farfugin A and farfugin B. Bull. Chem. Soc. Japan47: 1994.
  CAS Google Scholar
• —,Y. Tanahashi, Y. Moriyama andT. Takahashi. 1973. New furanoeremophilane derivatives from_Farfugium japonicum_ Kitamura. Bull. Chem. Soc. Japan46: 2840.
  CAS Google Scholar
• Nagumo, S., K. Izawa, K. Higashiyama andM. Nagai. 1980. A bitter principle of_Pertya robusta_ (Maxim.) Beav. Yakugaku Zasshi100: 427.
  CAS Google Scholar
• Naidenova, E. andE. Bloshik. 1978. Study of Bulgarian plants for sesquiterpene lactone content. I. Parthenolides in_Inula aschersoniana_Ika. var.aschersoniana Staj., Stef. and Kitan. Farmatsiya (Sofia)28: 26; Chem. Abstr.89: 193899u (1978).
  CAS Google Scholar
• Nakatani, N., C. Bohnstedt andT. J. Mabry. 1973. The origin of_Ambrosia chamissonis_ in Chile. Biochem. System.1: 129.
  CAS Google Scholar
• Nano, G. M., A. Martelli andP. Sancin. 1966. Chemical investigations of_Artemisia_ grown in Piedmont. Riv. Ital. Essenze-Profumi, Piante Offic., Aromi-Saponi, Cosm. Aerosol98: 409; Chem. Abstr.66: 31930v (1967).
  CAS Google Scholar
• Narain, N. K. 1978. Spectroscopic studies of fasciculide B, a new sesquiterpene lactone from the leaves of_Vernonia fasciculata_ Misch. Spectrosc. Letters11: 267.
  CAS Google Scholar
• Naya, K., M. Hayashi, I. Takagi, S. Nakamura andM. Kobayashi. 1972. The structural elucidation of sesquiterpene lactones from_Petasites japonicus_ Maxim. Bull. Chem. Soc. Japan45: 3673; Chem. Abstr.78: 124744a (1973).
  CAS Google Scholar
• —,R. Kanazawa andM. Sawada. 1975. The photosensitized oxygenation of furanoeremophilanes. I. The isomeric hydroperoxides from petasalbin and their transformations to lactones. Bull. Chem. Soc. Japan48: 3220; Chem. Abstr. 84: 90329a (1976).
  CAS Google Scholar
• -,M. Kawai, M. Naito and T. Kasai. 1972. Structures of eremofukinone, 9acetoxyfukinanolide and S-japonin from_Petasites japonicus_. Chem. Letters, 241.
• -,Y. Miyoshi, H. Mori, K. Takai and M. Nakanishi. 1976. The sesquiterpenes of_Cacalia_ species. Chem. Lett. 73.
• -,I. Takagi, M. Hayashi, S. Nakamura, M. Kobayashi and S. Katsumura. 1968. Structures of new skeletal sesquiterpenoids from_Petasites japonicus_ Maxim. Chem. Ind. 318.
• Nazarenko, M. V. 1965. Guaianolides of sievers wormwood,Artemisia sieversiana. Zh. Prikl. Khim.38: 2372; Chem. Abstr.64: 3608g (1966).
  CAS Google Scholar
• — andL. I. Leont’eva. 1966. Sieversinin, a new sesquiterpenicγ-lactone. Khim. Prir. Soedin.2: 399; Chem. Abstr.67: 32803p (1967).
  CAS Google Scholar
• Neshta, I. D. andN. A. Kaloshina. 1972. Leucomisin from_Achillea cartilaginae_. Khim. Prir. Soedin.8: 652; English ed. p. 625.
  Google Scholar
• -,K. S. Rybalko, O. A. Konovalova and O. F. Ivanenko. 1976. Lactones of_Achillea micrantha_ and_A. vermicularis_. Khim. Prir. Soedin. 395; Chem. Abstr. 85: 106653k (1976).
• Nikonova, L. P. 1973. Lactones of_Inula magnifica_. Khim. Prir. Soedin.9: 558; English ed. p. 528; Chem. Abstr.80: 45620v (1974).
  CAS Google Scholar
• — andG. K. Nikonov. 1972. Granilin—a new lactone from_Inula grandis_. Khim. Prir. Soedin.8: 289; English ed. p. 286; Chem. Abstr.78: 2009u (1973).
  Google Scholar
• ——. 1970. Grandulin and grandicin. New sesquiterpene lactones from_Inula grandis_. Khim. Prir. Soedin.6: 133; Chem. Abstr.73: 117175j (1970).
  CAS Google Scholar
• ——. 1970. Igalan, a new sesquiterpene lactone from_Inula grandis_. Khim. Prir. Soedin.6: 508.
  CAS Google Scholar
• ——. 1976. Sesquiterpene lactones from_Ligularia macrophylla_ and_L. thomsonii_. Khim. Prir. Soedin.6: 742; Chem. Abstr.86: 1030556 (1977).
  Google Scholar
• ——. 1971. Sesquiterpenes of the roots of_Inula grandis_. Khim. Prir. Soedin.7: 17; English ed. p. 14.
  CAS Google Scholar
• Nisikawa, Y., Y. Watanabe, I. Seto andI. Yasuda. 1976. Studies on the components of_Atractylodes_. I. New sesquiterpenoids in the rhizomes of_Atractylodes lancea_ DC. J. Pharm. Soc. Japan96: 1089; Chem. Abstr.85: 192927g (1976).
  CAS Google Scholar
• Nordenstam, B. 1978. Senecioneae and Liabeae—systematic review. Page 799_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Novikov, V. I., F. N. Forostyan andD. P. Popa. 1970. A sesquiterpene lactone of_Cyclachaena xanthifolia_, anhydrocoronopilin. Khim. Prir. Soedin.6: 29; Chem. Abstr.73: 45615c (1970).
  CAS Google Scholar
• ———. 1969. Structure of the sesquiterpene lactone from_Cyclachaena xanthifolia_. Khim. Prir. Soedin5: 487; Chem. Abstr.73: 15019u (1970).
  CAS Google Scholar
• Novotny, L. andV. Herout. 1962. The composition of_Artemisia sieversiana_ Willd. Collect. Czech. Chem. Comm.27: 1508.
  CAS Google Scholar
• —— andF. Sôrm. 1964. Constitution of petasalbine, albopetasine and hydroxyeremophilenolide, the components of_Petasites albus_ L. rhizomes. Collect. Czech. Chem. Comm.29: 2189.
  CAS Google Scholar
• -, -, and -. 1961. Substances from_Petasites officinalis_ Moench. and_Petasites albus_ (L.). Gaertn. Tetrahedron Lett. 697.
• ———. 1960. A contribution to the structure of absinthin and anabsinthin. Collect. Czech. Chem. Comm.25: 1492.
  CAS Google Scholar
• ———. 1960. A contribution to stereochemistry of absinthin and artabsin. Collect. Czech. Chem. Comm.25: 1500.
  CAS Google Scholar
• ———. 1964. Constitution of petasitolides and S-petasitolides. Collect. Czech. Chem. Comm.29: 2182.
  CAS Google Scholar
• —,J. Jizba, V. Herout andF. Sôrm. 1962. The constituents of coltsfoot rhizomes (Petasites officinalis Moench.). Collect. Czech. Chem. Comm.27: 1393.
  CAS Google Scholar
• ————. 1963. Constitution and absolute configuration of eremophilenolide. Tetrahedron19: 1101.
  CAS Google Scholar
• —,K. Kotva, J. Toman andV. Herout. 1972. Sesquiterpenes from_Petasites_. Phytochemistry11: 2795.
  CAS Google Scholar
• —,J. Toman, F. Stary, A Márquez, V. Herout andF. Sôrm. 1966. Contribution to the chemotaxonomy of some European_Petasites_ species. Phytochemistry5: 1281.
  CAS Google Scholar
• —,T. Toman andV. Herout. 1968. Terpenoids of the_Petasites paradoxus_ and_Petasites kablikianus_ in relation to their phylogeny. Phytochemistry7: 1349.
  CAS Google Scholar
• Ohno, N., J. Gershenzon, C. Roane andT. J. Mabry. 1980. 11,13-dehydrodesacetylmatricarin and other sesquiterpene lactones from_Artemisia ludoviciana_ var.ludoviciana and the identity of artecanin and chrysartemin B. Phytochemistry19: 103.
  CAS Google Scholar
• —,H. Hirai, H. Yoshioka, X. A. Domínguez andT. J. Mabry. 1973. Cynaropicrin, a sesquiterpene lactone from_Centaurea americana_. Phytochemistry12: 221.
  Google Scholar
• — andT. J. Mabry. 1979. Germacranolides from_Helianthus mollis_ Lam. Phytochemistry18: 1003.
  Google Scholar
• ——. 1980. Sesquiterpene lactones and diterpene carboxylic acids in_Helianthus niveus_ subspecies_canescens_. Phytochemistry19: 609.
  Google Scholar
• —,S. McCormick andT. J. Mabry. 1979. Centratherin, a new germacranolide from_Centratherum punctatum_. Phytochemistry18: 681.
  Google Scholar
• Olivier, E. J., D. L. Perry andN. H. Fischer. 1980. Two new germacranolides from_Melampodium leucanthum_ and their reductive and oxidative rearrangements. J. Organ. Chem. (USA)45: 4028.
  CAS Google Scholar
• Ortega, A., C. Guerrero andJ. Romo. 1973. Structure of zexbrevin D. Rev. Latinoamer. Quím.4: 91; Chem. Abstr.81: 142429g (1974).
  CAS Google Scholar
• ——,A. Romo de Vivar, J. Romo andA. Palafox. 1971. La orizabina y la zexbrevina B, nuevos germacranólidos furánicos. Rev. Latinoamer. Quím.2: 38.
  CAS Google Scholar
• —,R. Lara, R. Martínez andE. Díaz. 1980. Sphaerocephalin, a germacranolide isolated from_Viguiera sphaerocephala_. Phytochemistry19: 1545.
  CAS Google Scholar
• —,A. Romo de Vivar andJ. Romo. 1968. Odoratin: A new pseudoguaianolide isolated from_Hymenoxys odorata_ DC. Canad. J. Chem.46: 1539.
  CAS Google Scholar
• ——,E. Diaz andJ. Romo. 1970. Determinación de las estructuras de la calaxina y de la ciliarina, nuevos germacranólidos furanónicos. Rev. Latinoamer. Quim.1: 81.
  CAS Google Scholar
• —,C. Vargas, C. Guerrero andA. Romo de Vivar. 1973. Los componentes de_Zexmenia brevifolia_. III. Estructura de zexbrevina C. Rev. Latinoamer. Quím.4: 1.
  CAS Google Scholar
• Osawa, T., A. Suzuki, S. Tamura, Y. Ohashi and Y. Sasada. 1973. Structure of chlorochrymorin, a novel sesquiterpene lactone from_Chrysanthemum morifolium_. Tetrahedron Lett. 5135.
• -,D. Taylor, A. Suzuki and S. Tamura. 1977. Revised structure and stereochemistry of chrysartemin B. Tetrahedron Lett. 1169.
• Padolina, W. G., N. Nakatani, H. Yoshioka, T. J. Mabry andS. A. Monti. 1974. Marginatin, a new germacranolide from_Vernonia_ species. Phytochemistry13: 2225.
  CAS Google Scholar
• —,H. Yoshioka, N. Nakatani, T. J. Mabry, S. A. Monti, R. E. Davis, P. J. Cox, G. A. Sim, W. H. Watson andI. Beth Wu. 1974. Glaucolide-A and -B, new germacranolide-type sesquiterpene lactones from_Vernonia_ (Compositae). Tetrahedron30: 1161.
  CAS Google Scholar
• Pal, R., D. K. Kulshreshtha and R. P. Rastogi. 1976. Chemical constituents of_Tithonia tagitiflora_ Desf. 1976. Constitution of tagitinin A. Indian J. Chem. Sect. B14B: 259.
• ———. 1976. Chemical constituents of_Tithonia tagitiflora_ Desf. Structure of tagitinin-B by application of homonuclear indor spectroscopy. Indian J. Chem. Sect. B14B: 77.
  CAS Google Scholar
• ———. 1976. Antileukemic and other constituents of_Tithonia tagitiflora_ Desf. J. Pharm. Sci.65: 918; Chem. Abstr.85: 72205y (1976).
  PubMed CAS Google Scholar
• ———. 1977. Chemical constituents of_Tithonia tagitiflora_ Desf. Part IV. Tagitinins C, D and F. Indian J. Chem. Sect. B15B: 208.
  CAS Google Scholar
• Papano, G. Y., P. Y. Malakov andF. Bohlmann. 1980. 8-β-hydroxydihydroperemanthin—ein neues Guajanolide aus_Inula aschersoniana_. Phytochemistry19: 152.
  CAS Google Scholar
• Parker, B. A. andT. A. Geissman. 1962. The sesquiterpenoid lactones of_Helenium bigelovii_ Gray. J. Organ. Chem. (USA)27: 4127.
  CAS Google Scholar
• Payne, W. W. 1962. Biosystematic studies of four wide-spread weedy species of ragweeds (Ambrosia: Compositae). Ph.D. Thesis. University of Michigan.
• —. 1964. A re-evaluation of the genus_Ambrosia_ (Compositae). J. Arnold Arbor.45: 401.
  Google Scholar
• —. 1976. Biochemistry and species problems in_Ambrosia_ (Asteraceae-Ambro_sieae)_. Plant Syst. Evol.125: 169.
  Google Scholar
• —,T. A. Geissman, A. J. Lucas andT. Saitoh. 1973. Chemosystematics and taxonomy_of Ambrosia chamissonis_. Biochem. System.1: 21.
  CAS Google Scholar
• Pennuri, E. andC. Steelink. 1962. Chamazulene from_Artemisia carruthii_. J. Pharm. Sci.51: 598; Chem. Abstr.57: 6021. (1962).
  Google Scholar
• Perry, D. L., D. M. Desiderio andN. H. Fischer. 1978. Mass spectra of germacranolide type sesquiterpene dilactones and derivatives. Org. Mass Spectr.13: 325.
  CAS Google Scholar
• — andN. H. Fischer. 1975. New germacranolide sesquiterpene dilactones from the genus_Melampodium_ (Compositae). J. Organ. Chem. (USA)40: 3480.
  CAS Google Scholar
• Persson, K. 1974. Biosystematic studies in the_Artemisia maritima_ complex in Europe. Opera Bot.35: 188.
  Google Scholar
• Pettersen, R. C. and H. L. Kim. 1976. X-ray structures of hymenoxon and hymenolane: Pseudoguaianolides isolated from_Hymenoxys odorata_ DC. (bitterweed). J. Chem. Soc. Perkin Trans. II: 1399.
• Pettit, G. R., C. L. Herald, D. Gust, D. L. Herald andL. D. Vanell. 1978. Antineoplastic agents. 55. Isolation and structure of multigilin and multistatin. J. Organ. Chem. (USA)43: 1092.
  CAS Google Scholar
• Pieman, A. K., R. H. Elliott andG. H. N. Towers. 1978. Insect feeding deterrent property of alantolactone. Biochem. System. Ecol.6: 333.
  Google Scholar
• —,G. H. N. Towers andP. V. Subba Rao. 1980. Coronopilin—another major sesquiterpene lactone in_Parthenium hysterophorus_. Phytochemistry19: 2206.
  Google Scholar
• Poljakov, P. P. 1961. Systematic studies in the genus_Artemisia_ L. Trudy Inst. Bot. Akad. Nauk. Kasakh., SSR Alma Ata11: 134.
  Google Scholar
• Poplawski, J., M. Holub, Z. Samek andV. Herout. 1971. Arnicolides—sesquiterpeneic lactones from the leaves of_Arnica montana_ L. Collect. Czech. Chem. Comm.36: 2189.
  CAS Google Scholar
• Popova, A. I., K. S. Rybalko and R. I. Evstratova. 1974. Sesquiterpene lactones from_Artemisia lagocephala, Artemisia schrenkiana_ and_Grossheimia ossica_. Khim. Prir. Soedin. 528; Chem. Abstr.82: 28594p (1975).
  Google Scholar
• Porter, T. H. andT. J. Mabry. 1969. Sesquiterpene lactones. Constituents of_Ambrosia artemisiifolia_ L. (Compositae). Phytochemistry8: 793.
  CAS Google Scholar
• ——,H. Yoshioka andN. H. Fisher. 1970. The isolation and structure determination of artemisiifolin, a new germacranolide from_Ambrosia artemisiifolia_ L. (Compositae). Phytochemistry9: 199.
  CAS Google Scholar
• Potter, J. 1970. Origin of the Texas Gulf Coast island populations of_Ambrosia psilostachya_ DC. (Compositae): A biochemical and numerical systematic investigation. Ph.D. Thesis, University of Texas at Austin.
• — andT. J. Mabry. 1972. Origin of the Texas Gulf Coast island populations of_Ambrosia psilostachya_: A numerical study using terpenoid data. Phytochemistry11: 715.
  CAS Google Scholar
• Power, F. B. and H. Browning. 1914. The constituents of the flowers of_Anthemis nobilis_. J. Chem. Soc. (London) 1829.
• Prochazka, V., Z. Cekan andR. B. Bates. 1963. Structure of globicin, a guaianolide from_Matricaria globifera_ (Thunb.) Druce. Collect. Czech. Chem. Comm.28: 1202.
  CAS Google Scholar
• Quijano, L., J. S. Calderón, F. Gómez G. andT. Ríos. 1979. Montafrusin, a new germacrolide from_Montanoa frutescens_. Phytochemistry18: 843.
  CAS Google Scholar
• ———,J. T. Garduno andT. Ríos C. 1980. Deltoidin A and B, two new germacrolides from_Eupatorium deltoideum_. Phytochemistry19: 1975.
  CAS Google Scholar
• —,D. Bloomenstiel andN. H. Fischer. 1979. Tetraludin A, B and C, three new melampolides from_Tetragonotheca ludoviciana_. Phytochemistry18: 1529.
  CAS Google Scholar
• — andN. H. Fischer. 1981. Melfusin, a new germacrolide from_Melampodium diffusum_ (Compositae, Heliantheae). J. Nat. Prod.44: 266.
  CAS Google Scholar
• —,E. J. Olivier andN. H. Fischer. 1980. Tetraludin D to N, eleven new melampolides from_Tetragonotheca ludoviciana_. Phytochemistry19: 1485.
  CAS Google Scholar
• —,A. Romo de Vivar andT. Ríos. 1978.Calea zacatechichi components. Structure of calein A and B. Rev. Latinoamer. Quím.9: 86.
  CAS Google Scholar
• ———. 1979. Revision of the structures of caleine A and B, germacranoline sesquiterpenes from_Calea zacatechichi_. Phytochemistry18: 1745.
  CAS Google Scholar
• —,A. Ortega, T. Rios andA. Romo de Vivar. 1975. Estructura de las zinaflorinas, nuevas lactonas sesquiterpénicas, aisladas de_Zinnia pauciflora_ L. Rev. Latinoamer. Quím.6: 94.
  CAS Google Scholar
• Quirishi, M. A., K. L. Dhar andC. K. Atal. 1980. A new sesquiterpene lactone from_Inula royleana_ roots. Pl. Med.38: 282.
  Google Scholar
• Raghaven, R., K. R. Ravindranath, G. K. Trivedi, S. K. Pakmikar andS. C. Bhattacharyya. 1969. Inunolide—a new sesquiterpene lactone from_Inula racemosa_ root. Indian J. Chem.7: 310; Chem. Abstr.70: 115345 (1969).
  Google Scholar
• Raffauf, R. F., P. K. C. Huang, P. W. LeQuesne, S. B. Levery andT. F. Brennan. 1975. Eremantholide A, a novel tumor-inhibiting compound from_Eremanthus elaeagus_ Schultz-Bip. (Compositae). J. Amer. Chem. Soc.97: 6884.
  CAS Google Scholar
• Rao, A. S., G. R. Kelkar andS. C. Bhattacharyya. 1960. The structure of costunolide, a new sesquiterpene lactone from_Costus-root_ oil. Tetrahedron9: 275.
  CAS Google Scholar
• —,A. P. Sadgopal andS. C. Bhattacharyya. 1961. Structure of saussurea lactone. Tetrahedron13: 319.
  Google Scholar
• Raszeja, W. andSt. Gill. 1977. Isolation and identification of psilostachyin B from_Ambrosia artemisiifolia_ L. Pl. Med.32: 319.
  CAS Google Scholar
• Ravindranath, K. R., S. K. Paknikar, G. K. Trivedi andS. C. Bhattacharyya. 1978. Structure and stereochemistry of inunolide, dihydroinunolide and neoalantolactone. Ind. J. Chem.16B: 27.
  CAS Google Scholar
• Renold, W. 1970. The chemistry and infraspecific variation of sesquiterpene lactones in_Ambrosia confertiflora_ DC. (Compositae): A chemosystematic study at the populational level. Ph.D. Thesis, The University of Texas at Austin.
• —,H. Yoshioka andT. J. Mabry. 1970. Chihuahuin, a new germacranolide from_Ambrosia confertiflora_ DC. (Compositae). J. Organ. Chem. (USA)35: 4264.
  CAS Google Scholar
• Revazova, L. V., P. V. Chugunov andD. Pakaln. 1970. Deacetylmatricarin from_Artemisia incana_. Khim. Prir. Soedin.6: 372; Chem. Abstr.73: 117180g (1970).
  CAS Google Scholar
• Rios, T., A. Romo de Vivar andJ. Romo. 1967. Stevin, a new pseudoguaianolide isolated from_Stevia rhombifolia_ HBK. Tetrahedron23: 4265.
  Google Scholar
• Robins, D. J. 1978. Senecioneae—chemical review. Page 831_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Robinson, H. 1978. Studies in the Heliantheae (Asteraceae). XII. Re-establishment of the genus_Smallanthus_. Phytologia39: 47.
  Google Scholar
• -. 1981. A revision of the tribal and subtribal limits of the Heliantheae. Smith. Cont. to Bot. No. 51.
• —,F. Bohlmann andR. M. King. 1980. Chemosystematic notes on the Asteraceae III. Natural subdivisions of the Vernonieae. Phytologia46: 421.
  Google Scholar
• — andR. M. King. 1978. Eupatorieae—systematic review. Page 437_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 1. Academic Press, London.
  Google Scholar
• Rodríguez, E. 1975. The chemistry and distribution of sesquiterpene lactones and flavonoids in_Parthenium_ (Compositae): Systematic and ecological implications. Ph.D. Thesis, University of Texas at Austin.
• — andT. J. Mabry. 1978. Tageteae—chemical review. Page 786_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• —,G. H. N. Towers andJ. C. Mitchell. 1976. Biological activities of sesquiterpene lactones. Phytochemistry15: 1573.
  Google Scholar
• —,H. Yoshioka andT. J. Mabry. 1972. Sesquiterpene lactone chemistry of_Parthenium fruticosum_ and_P. schottii_. Rev. Latinoamer. Quím.2: 184; Chem. Abstr.76: 153956k (1972).
  Google Scholar
• ———. 1971. The sesquiterpene lactone chemistry of the genus_Parthenium_ (Compositae). Phytochemistry10: 1145.
  Google Scholar
• Rodríguez-Hahn, L., A. Guzmán andJ. Romo. 1968. Constituents of_Cacalia decomposita_ IV. Structure and decomposition Tetrahedron24: 477.
  Google Scholar
• — andJ. Rodríguez. 1972. Resinone, anew triterpene from_Flourensia resinosa_. Rev. Latinoamer. Quím.4: 148; Chem. Abstr.79: 15861m (1973).
  Google Scholar
• Romanuk, M., V. Herout andF. Sôrm. 1956. The constitution of dehydrocostuslactone. Collect. Czech. Chem. Comm.21: 894.
  CAS Google Scholar
• Romo, J., P. Joseph-Nathan andF. Díaz. 1964. The constituents of_Helenium aromaticum_ (Hook.) Bailey. The structures of aromatin and aromaticin. Tetrahedron20: 79.
  CAS Google Scholar
• ——,A. Romo de Vivar andC. Alvarez. 1967. The structure of peruvinin, a pseudoguaianolide isolated from_Ambrosia peruviana_ Willd. Tetrahedron23: 529.
  CAS Google Scholar
• —— andG. Siade. 1966. The structure of cumanin, a constituent of_Ambrosia cumanensis_. Tetrahedron22: 1499.
  CAS Google Scholar
• —,T. Rios andL. Quijano. 1968. Ligustrin, a guaianolide isolated from_Eupatorium ligustrinum_ DC. Tetrahedron24: 6087.
  CAS Google Scholar
• — andL. Rodríguez-Hahn. 1970. Canambrin, a new sesquiterpene dilactone from_Ambrosia canescens_. Phytochemistry9: 1611.
  CAS Google Scholar
• —,A. Romo de Vivar andE. Díaz. 1968. The guaianolides of_Ambrosia cumanensis_ HBK. The structures of cumambrins A and B. Tetrahedron24: 5625.
  CAS Google Scholar
• —— andM. Aguilar. 1969. Natural products from Compositae species. Neohelenalin. Bol. Inst. Quím. Univ. Nac. Autón. Mexico21: 66.
  CAS Google Scholar
• -,-, andP. Joseph-Nathan. 1966. The structure of mexicanin H. Tetrahedron Lett. 1029.
• ———. 1967. The constituents of_Zaluzania augusta_. The structures of zaluzanins A and B. Tetrahedron23: 29.
  CAS Google Scholar
• —— andW. Herz. 1963. Constituents of_Helenium_ species. XIV. The structure of mexicanin E. Tetrahedron19: 2317.
  CAS Google Scholar
• ——,A. Ortega, E. Díaz andM. A. Carino. 1971. Las estructuras de la zinarosina y de la dihydrozinarosina, componentes de la_Zinnia acerosa_ (DC.) Gray. Rev. Latinoamer. Quím2: 24.
  CAS Google Scholar
• ——,R. Trevino, P. Joseph-Nathan andE. Díaz. 1970. Constituents of_Artemisia_ and_Chrysanthemum_ species. The structure of chrysartemins A and B. Phytochemistry9: 1615.
  CAS Google Scholar
• ——,A. Vélez andE. Urbina. 1968. Franserin and confertin: New pseudoguaianolides isolated from_Franseria_ and_Ambrosia_ species. Canad. J. Chem.146: 1535.
  Google Scholar
• — andH. Tello. 1972. Estudio de la_Artemisia mexicana_. Armexina, un nuevo santanólido cuya lactona posee fusión cis. Rev. Latinoamer. Quím.3: 122; Chem. Abstr.78: 121339m (1973).
  CAS Google Scholar
• Romo de Vivar, A., M. Aguilar, H. Yoshioka, E. Rodríguez, A. Higo, J. A. Mears andT. J. Mabry. 1970. New pseudoguaianolides from_Parthenium confertum_ Gray (Compositae). Tetrahedron26: 2775.
  CAS Google Scholar
• —,E. Bratoeff, E. Ontiveros, D. C. Lankin andN. S. Bhacca. 1980. Viguilenin, a germacranolide from_Viguiera linearis_. Phytochemistry19: 1795.
  CAS Google Scholar
• —,E. A. Bratoeff andT. Ríos. 1966. Structure of hysterin, a new sesquiterpene lactone. J. Organ. Chem. (USA)31: 673.
  Google Scholar
• —,A. Cabrera, A. Ortega andJ. Romo. 1967. Constituents of_Zaluzania_ species—II. Structures of zaluzanin C and zaluzanin D. Tetrahedron23: 3903.
  CAS Google Scholar
• —,G. Delgado, C. Guerrero, J. Resendiz andA. Ortega. 1978. Estudio de viguieras. Estructura de la viguiepinina y correción de la viguiestenina. Rev. Latinoamer. Quím.9: 171.
  Google Scholar
• — andG. González. 1971. Aislamiento de la lactona dihydrocostus. Preparación de espiroepóxidos de lactonas sesquiterpénicas. Rev. Latinoamer. Quím.2: 142; Chem. Abstr.76: 46326h (1972).
  CAS Google Scholar
• —,C. Guerrero andG. Wittgreen. 1970. Los terpenoides de_Parthenium incanum_ HBK. Rev. Latinoamer. Quím.1: 39; Chem. Abstr.74: 88165u (1971).
  CAS Google Scholar
• ——,E. Díaz, E. A. Bratoeff andL. Jiménez. 1976. The germacranolides of_Viguiera buddleiaeformis_. Structures of budlein A and B. Phytochemistry15: 525.
  CAS Google Scholar
• ——— andA. Ortega. 1970. Structure and stereochemistry of zexbrevin A3 (2H) furanone germacranolide. Tetrahedron26: 1657.
  Google Scholar
• —— andG. Wittgreen. 1970. Terpenoids from_Parthenium incanum_ HBK. Rev. Latinoamer. Quím.1: 39; Chem. Abstr.74: 88165u (1971).
  CAS Google Scholar
• ——. 1965. Structure of santamarine, a new sesquiterpene lactone. Tetrahedron21: 1741.
  Google Scholar
• — andA. Ortega. 1969. Structures of bahia-I and bahia-II, two new guaianolides. Canad. J. Chem.47: 2849.
  CAS Google Scholar
• —,A. L. Pérez, H. Flores, L. Rodríguez-Hahn andM. Jiménez. 1978. Confertdiolide, a novel sesquiterpenoid lactone from_Parthenium_. Phytochemistry17: 279.
  CAS Google Scholar
• —,L. Rodríguez-Hahn, J. Romo, M. V. Lakshmikantham, R. N. Mirrington, J. Kagan andW. Herz. 1966. Constituents of_Helenium_ species—XIX. Further transformations of helenalin and its congeners. The 1-epihelanalin and 1-epiambrosin series. Tetrahedron22: 3279.
  CAS Google Scholar
• -and J. Romo. 1959. Constituents of_Helenium mexicanum_ HBK. Chem. Ind. 882.
• —,F. Vázquez andC. Zetina. 1977. Sesquiterpene lactones of_Artemisia mexicana_ var.angustifolia. Rev. Latinoamer. Quím.8: 127.
  CAS Google Scholar
• Rosenthal, G. A. andE. A. Bell. 1979. Naturally-occurring toxic non-protein amino acids. Page 353_in_ G. A. Rosenthal and D. H. Janzen (eds.). Herbivores: Their interaction with secondary plant metabolites. Academic Press, New York.
  Google Scholar
• Ruban, G., V. Zabel, K. H. Gensch andH. Smalla. 1978. The crystal structure and absolute configuration of lactucin. Acta Crystall. B34: 1163.
  Google Scholar
• Rüesch, H. andT. J. Mabry. 1969. The isolation and structure of tetraneurin A, a new pseudoguaianolide from_Parthenium alpinum_ var.tetraneuris (Compositae). Tetrahedron25: 805.
  Google Scholar
• Rustaiyan, A. andL. Nazarians. 1977. Isolation of the sesquiterpene lactone deacetoxymatricarin from_Achillea eriophora_ DC. Fitoterapia48: 175.
  CAS Google Scholar
• —— andF. Bohlmann. 1979. Two new germacranolides from_Onopordon leptolepis_ DC. Phytochemistry18: 883.
  CAS Google Scholar
• ———. 1979. Two new elemanolides from_Onopordon leptolepis_. Phytochemistry18: 879.
  CAS Google Scholar
• ———. 1980. Germacranolides from_Erlangea cordifolia_. Phytochemistry19: 1230.
  CAS Google Scholar
• ———. 1981. Guaianolides from_Acroptilon repens_. Phytochemistry20: 1152.
  CAS Google Scholar
• —,A. Niknejad, F. Bohlmann andA. Schuster. 1981. A guaianolide from_Jurinea carduiformis_. Phytochemistry20: 1154.
  CAS Google Scholar
• —— andL. Nazarians. 1978. Isolation and structure determination of naturally-occurring sesquiterpene lactone from Compositae. Pazhoohandeh (Tehran)21: 183; Chem. Abstr.92: 143262x (1980).
  CAS Google Scholar
• Ruzicka, L., P. Pieth, T. Reichstein andL. Ehinann. 1933. Zur Kenntnis der Alantolactone. Synthese des l,4-dimethyl-6-isopropyl und des 1,5-dimethyl-7-isopropylnaphthalins. Helv. Chim. Acta16: 268.
  CAS Google Scholar
• Rybalko, K. S. 1965. Isolation of mibulactone from_Artemisia taurica_. Khim. Prir. Soedin. 142; Chem. Abstr.63: 6786f (1965).
• — andL. Dolejs. 1961. Structure of tauremisin, a sesquiterpenic lactone of santonine type from_Artemisia taurica_ Willd. Collect. Czech. Chem. Comm.26: 2909.
  CAS Google Scholar
• —,O. A. Konovalova, N. D. Orishchenko andA. L. Shreter. 1976. Lactones of some species of the genus_Saussurea_ DC. Rastit. Resur.12: 387; Chem. Abstr. 85: 174252d (1976).
  CAS Google Scholar
• -, -,and E. F. Petrova. 1976. Orientin, a new sesquiterpene lactone from_Sigesbeckia orientalis_. Khim. Prir. Soedin. 394; Chem. Abstr.85: 124182k (1976).
• —,P. S. Massagetov andR. I. Evstratova. 1963. Sesquiterpene lactones from some forms of wormwood. Med. Prom., SSSR17: 41; Chem. Abstr.59: 11888d (1963).
  CAS Google Scholar
• Rydberg, P. A. 1927. Carduaceae (Carduales). Liabeae, Neurolaeneae, Senecioneae (Pars.). N. Amer. F1.34: 289.
  Google Scholar
• Saitoh, T., T. A. Geissman, T. G. Waddell, W. Herz andS. V. Bhat. 1971. Sesquiterpene lactones of_Eriophyllum confertiflorum_ (DC.) Gray. Rev. Latinoamer. Quím.2: 69; Chem. Abstr.75: 129952q (1971).
  Google Scholar
• Saleh, A. A., G. A. Cordell and N. R. Farnsworth. 1977. Acanthamolide, a melampolide amide from_Acanthospermum glabratum_ (Compositae). Chem. Commun. 376.
• Salmon, M., E. Díaz andA. Ortega. 1973. Christinine, a new epoxyguaianolide from_Stevia serrata_ Cav. J. Organ. Chem. (USA)38: 1759.
  CAS Google Scholar
• —,A. Ortega andE. Díaz. 1975. Structure and stereochemistry of a new germacrane sesquiterpene lactone. Rev. Latinoamer. Quím.6: 45; Chem. Abstr.83: 193528y (1975).
  CAS Google Scholar
• Salo, D. P., M. M. Pashehenko, G. P. Pivenko, I. N. Matvienko andA. D. Avdenin. 1973. Medicinal forms from the plant of_Xanthium riparium_ and preliminary data of their experimental study. Farm. Zh. (Kiev)28: 68; Chem. Abstr.79: 27209t (1973).
  CAS Google Scholar
• Samek, Z., M. Holub, B. Drozdz, G. Jommi, A. Corbella and P. Gariboldi. 1971. Sesquiterpenic lactones of the_Cynara scolymus_ L. species. Tetrahedron Lett. 4775.
• ——,H. Grabarczyk, B. Drozdz andV. Herout. 1973. Structure of sesquiterpenic lactones from_Tanacetum vulgare_ L. Collect. Czech. Chem. Comm.38: 1971.
  CAS Google Scholar
• —————. 1977. The structure of hydroxyisonobilin—a cytostatically active sesquiterpene lactone from the leaves of_Anthemis nobilis_ L. Collect. Czech. Chem. Comm.42: 1065.
  CAS Google Scholar
• -, -,V. Herout and F. Sôrm. 1969. Revision of the structure of cnicin. Tetrahedron Lett. 2931.
• ——,V. J. Novikov, J. N. Forostjan andD. P. Popa. 1970. The structure of ivoxanthin, a sesquiterpenic lactone from_Cyclachaena xanthifolia_ Fresen. Collect. Czech. Chem. Comm.35: 3818.
  CAS Google Scholar
• -, -,U. Rychlewska. H. Grabarczyk and B. Drozdz. 1979. Germacral(10),4-diene-cis-6,12-olides: A novel stereochemical group of natural sesquiterpene lactones from_Ursinia anthemoides_ (L.) Poiret. Tetrahedron Lett. 2691.
• —,J. Harmatha, L. Novotny andF. Sôrm. 1969. Terpenes. CCII. Absolute configuration of adenostylone, neoadenostylone and isoadenostylone from_Adenostyles alliarieae_ and of decomposistine from_Cacalia decomposisita_. Coll. Czech. Chem. Comm.34: 2792; Chem. Abstr.71: 91676e (1969).
  CAS Google Scholar
• —,M. Holub, E. Bloszyk, B. Drozdz andV. Herout. 1975. Relative and absolute configuration of the sesquiterpenic lactone erivanin. Collect. Czech. Chem. Comm.40: 2676.
  CAS Google Scholar
• ——,B. Drozdz andH. Grabarczyk. 1977. Arctolide, a new sesquiterpenic lactone from_Arctotis grandis_ Thunb. Collect. Czech. Chem. Comm.42: 2217.
  CAS Google Scholar
• ———— andB. Hladon. 1977. Xerantholide—a new cytotoxically active sesquiterpene lactone from_Xeranthenum cylindraceum_. Collect. Czech. Chem. Comm.42: 2441.
  CAS Google Scholar
• ——,K. Vokac, B. Drozdz, G. Jommi, P. Gariboldi andA. Corbella. 1972. The structure of grosheimin. Collect. Czech. Chem. Comm.37: 2611.
  CAS Google Scholar
• Sánches Parareda, I., J. Sánches Parareda andJ. M. Viguera. 1968. Stenophyllolide, a new sesquiterpene lactone. An. Chim.64: 633; Chem. Abstr.70: 37933c (1969).
  Google Scholar
• Sánchez-Viesca, F. andJ. Romo. 1963. Estafiatin, a new sesquiterpene lactone isolated from_Artemisia mexicana_ (Willd.). Tetrahedron19: 1285.
  Google Scholar
• Satoda, I., N. Yoshidaand E. Yoshii. 1960. Extraction of lumisantonin from_Artemisia_ plants. Japan 4127; Chem. Abstr.54: 23213b (1960).
• ———. 1959. Isolation of lumisantonin from_Artemisia kurramensis_. J. Pharm. Soc. Japan79: 267; Chem. Abstr.53: 11532h (1959).
  CAS Google Scholar
• Schenck, G., H. Graf andW. Schreber. 1939. Bitter substances from the latex of_Lactuca virosa_. Isolation of lactucin and lactucopicrin. Arch. Pharm. Deutsch.277: 137.
  CAS Google Scholar
• Schneider, G. andK. Thiele. 1974. Properties and determination of the bitter principle cynaropicrin in_Cynara_. Pl. Med.25: 149; Chem. Abstr.81: 35534b (1974).
  CAS Google Scholar
• ——. 1974. Distribution of the bitter principle cynaropicrin in_Cynara_. Pl. Med.26: 174; Chem. Abstr.82: 54198g (1975).
  CAS Google Scholar
• Schulz, K. H., B. M. Hausen, L. Wallhoefer andP. Schmidt-Loeffler. 1975. Chrysanthemum allergy. Experimental studies on the causative agents. Arch. Dermatol. Forsch.251: 235; Chem. Abstr.82: 110222z (1975).
  PubMed CAS Google Scholar
• Seaman, F. C. 1976. A comparative phytochemical study of ten Sonoran Desert species_of Ambrosia_ (Asteraceae). Doctoral Thesis. University of Texas at Austin.
• — andN. H. Fischer. 1978. Longipilin, a new melampolide from_Melampodium longipilum_ (Heliantheae, Compositae). Phytochemistry17: 2131.
  CAS Google Scholar
• ——. 1979. Longipin, a new melampolide from_Melampodium longipes_ (Heliantheae, Compositae). Phytochemistry18: 1065.
  CAS Google Scholar
• ——. 1980. Six new melampolides from_Tetragonotheca helianthoides_. Phytochemistry19: 583.
  CAS Google Scholar
• ——. 1980. New germacrolideand heliangolide-type sesquiterpene lactones from_Melampodium linearilobum_. Phytochemistry19: 849.
  CAS Google Scholar
• —— andT. F. Stuessy. 1980. Systematic implication of sesquiterpene lactones in the subtribe Melampodiinae. Biochem. System. Ecol.8: 263.
  CAS Google Scholar
• —,G. P. Juneau, D. R. di Feo, S. Jungk andN. H. Fischer. 1979. Repandin A, B, C and D, four new germacranolides from_Tetragonotheca repanda_ (Compositae). J. Organ. Chem. (USA)44: 3400.
  CAS Google Scholar
• — andT. J. Mabry. 1979. Sesquiterpene lactones of diploid and tetraploid_Ambrosia camphorata_. Biochem. System. Ecol.7: 3.
  CAS Google Scholar
• ——. 1979. Sesquiterpene lactone patterns in diploid and polyploid_Ambrosia dumosa_. Biochem. System. Ecol.7: 7.
  CAS Google Scholar
• ——. 1979. Dumosin, a new secoambrosanolide from_Ambrosia dumosa_ (Gray) Payne (Compositae). Rev. Latinoamer. Quím.10: 85.
  CAS Google Scholar
• ——. 1979. Sesquiterpene lactones and species relationships among the shrubby_Ambrosia_ taxa. Biochem. System. Ecol.7: 105.
  CAS Google Scholar
• Segal, R., S. Sokoloff, B. Haran, D. V. Zaitschek andD. Lichtenberg. 1977. New sesquiterpene lactones from_Artemisia herba-alba_. Phytochemistry16: 1237.
  CAS Google Scholar
• Seigler, D. S., D. H. Wilken andJ. J. Jakupeak. 1974. Chemical data related to the tribal affinities of_Hulsea_ and_Arnica_. Biochem. System. Ecol.2: 21.
  CAS Google Scholar
• Semmler, F. W. andJ. Feldstein. 1914. Zur Kenntnis der Bestandteile der Ätherischen Öle (Über das Vorkommen einer Säure C15H22O2 und Zweier Lactone C15H22O2 und C15H20O2 im Costuswurzelöl). Ber. Dtsch. Chem. Ges.47: 2433.
  CAS Google Scholar
• Serkerov, S. V. 1977. A study of badkhyzinin. Khim. Prir. Soedin.13: 787; English ed. p. 663.
  Google Scholar
• —,R. M. Abbasov andA. N. Aleskerova. 1976. Sesquiterpene lactones from_Artemisia hanseniana_. Khim. Prir. Soedin.12: 661; Chem. Abstr.86: 103081g (1977).
  Google Scholar
• — andA. N. Aleskerova. 1978. The structure of a sesquiterpene lactone from_Artemisia fragrans_. Khim. Prir. Soedin.14: 75; English ed. p. 59.
  Google Scholar
• Shafizadeh, F. andN. R. Bhadane. 1972. Sesquiterpene lactones of sagebrush. New guaianolides from_Artemisia cana_ ssp.viscidula. J. Organ. Chem. (USA)37: 3168.
  CAS Google Scholar
• ——. 1972. Badgerin, a new germacranolide from_Artemisia arbuscula_ spp.arbuscula. J. Organ. Chem. (USA)37: 274.
  CAS Google Scholar
• ——. 1973. Sesquiterpene lactones of_Artemisia arbuscula_ and_A. tridentata_. Phytochemistry12: 857.
  CAS Google Scholar
• —— andR. G. Kelsey. 1974. Sesquiterpene lactones of sagebrush. Constituents of_Artemisia tripartita_. Phytochemistry13: 669.
  CAS Google Scholar
• ——,M. S. Morris, R. G. Kelsey andS. N. Khanna. 1971. Sesquiterpene lactones of big sagebrush. Phytochemistry10: 2745.
  CAS Google Scholar
• Sham’yanov, I. D., A. Mallabaev, V. Rakhmankulov andG. P. Sidyakin. 1976. Sesquiterpene lactones of_Saussurea elegans_. Khim. Prir. Soedin.12: 819; Chem. Abstr.86: 136305m (1977).
  Google Scholar
• —— andG. P. Sidyakin. 1978. Structure of the sesquiterpene lactone elegin. Khim. Prir. Soedin.14: 442; Chem. Abstr.89: 197740h (1978).
  Google Scholar
• Shibata, H. andS. Shimizu. 1978. Three chemovars of_Petasites japonicus_ Maxim. Agric. Biol. Chem.42: 1427; Chem. Abstr.89: 193827u (1978).
  CAS Google Scholar
• Shirahata, K., T. Kato, Y. Kitahara andN. Abe. 1969. Constituents of genus_Petasites_. Bakkenolide-A, a sesquiterpene of novel carbon skeleton. Tetrahedron25: 3179.
  CAS Google Scholar
• Silva, M. 1967. Constituents of_Helenium plantagineum_. J. Pharm. Sci.56: 922; Chem. Abstr.67: 51040d (1967).
  PubMed CAS Google Scholar
• Sims, J. J. andK. A. Berryman. 1972. Virginin. A sesquiterpene lactone from_Encelia virginensis_. Phytochemistry11: 444.
  CAS Google Scholar
• Simonovic, D. M., A. S. Rao andS. C. Bhattacharyya. 1963. The synthesis of tetrahydrosaussurea lactone. Tetrahedron19: 1061.
  CAS Google Scholar
• Snatzke, G. 1968. Stereochemistry of sesquiterpenes and circular dichroism. Mezhdunar, Kongr. Efirnym. Maslam. [Mater.]4: 316; Chem. Abstr.78: 124746c (1973).
  Google Scholar
• Soucek, M., V. Herout andF. Sôrm. 1961. Constitution of parthenolide. Collect. Czech. Chem. Comm.26: 803.
  CAS Google Scholar
• Spitzer, J. C. andC. Steelink. 1967. Isolation of matricin from_Artemisia caruthii_. J. Pharm. Sci.56: 650; Chem. Abstr.67: 22030v (1967).
  PubMed CAS Google Scholar
• Stagno d’Alcontres, G., M. Gattuso, M. C. Aversa and C. Caristi. 1973. The structure of graveolide, a new sesquiterpene lactone. Gazz. Chim. Ital. 239; Chem. Abstr. 79: 53614r (1973).
• Stahl, E. and S. N. Datta. 1972. New sesquiterpenoids of the ground ivy (Glechoma hederacea Liebigs). Ann. Chem. 757; Chem. Abstr.77: 98721y (1972).
  Google Scholar
• Stefanovic, M., A. Jokic, A. Behbud and D. Jeremic. 1976. New sesquiterpenic lactones from_Ambrosia artemisiifolia_ L. 8-acetoxy-3-pseudoguaian-6,12-olide and 4hydroxy-3-oxo-pseudoguaian-6,12-olide. Bull. Acad. Serbe. Sci. Arts Cl. Sci. Math. Nat. Sci. Nat. 54; Chem. Abstr.87: 35891q (1977).
• St. Pyrek, J. 1977. Isolation of gaillardin from flowers of_Inula britannica_ L. Rocz. Chem.51: 1277; Chem. Abstr.87: 197230a (1977).
  CAS Google Scholar
• —. 1977. Terpenes of Compositae plants. Part V. Sesquiterpene lactones of_Lactuca serriola_ L. The structure of 8-deoxylactucin and the site of esterification of lactupicrin. Rocz. Chem.51: 2165.
  CAS Google Scholar
• Stoutamire, W. 1977. Chromosome races of_Gaillardia pulchella_ (Asteraceae). Brittonia29: 297.
  Google Scholar
• Stuessy, T. F. 1971. Systematic relationships in the white-rayed species of_Melampodium_ (Compositae). Brittonia23: 177.
  Google Scholar
• —. 1978. Heliantheae—systematic review. Page 621_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Suchy, M. 1962. The structure of balchanin, a sesquiterpenic lactone of santonin type from_Artemisia balchanorum_. H. Krash. Coll. Czech. Chem. Comm.27: 2925.
  CAS Google Scholar
• —,L. Dolejs, V. Herout, F. Sôrm, G. Snatzke andJ. Himmelreich. 1969. The constitution of jurineolide, a new germacranolide from_Jurinea cyanoides_ (L.) Rchb. Collect. Czech. Chem. Comm.34: 229.
  CAS Google Scholar
• —,V. Herout andF. Sôrm. 1960. On hydrogenation products of cynaropicrin, the bitter principle of artichoke (Cynara scolymus L.). Collect. Czech. Chem. Comm.25: 507.
  CAS Google Scholar
• ———. 1960. Structure of cynaropicrin. Collect. Czech. Chem. Comm.25: 2777.
  CAS Google Scholar
• ———. 1963. Lactones of the germacranolide group and their stereochemical relationship. Collect. Czech. Chem. Comm.28: 1715.
  CAS Google Scholar
• ———. 1963. The proof of existence and structure of hydroxycostunolide, a sesquiterpenic lactone of germacrane type in_Artemisia balchanorum_ H. Krash. Collect. Czech. Chem. Comm.28: 1618.
  Google Scholar
• ———. 1963. On terpenes CLV. Structure of damsine, a sesquiterpenic lactone from_Ambrosia maritima_ L. Collect. Czech. Chem. Comm.28: 2257.
  CAS Google Scholar
• ———. 1962. Isolation and structure of scabiolide. Further sesquiterpene lactone with a ten-membered ring in molecule. Collect. Czech. Chem. Comm.27: 1905.
  CAS Google Scholar
• ———. 1964. Proof of structure of guaianolides artabsin and arborescin. Collect. Czech. Chem. Comm.29: 1829.
  CAS Google Scholar
• ———. 1965. The structure of salonitolide, a sesquiterpenic lactone of germacrane type from_Centaurea salonitana_ Vis. Collect. Czech. Chem. Comm.30: 2863.
  CAS Google Scholar
• —,Z. Samek, V. Herout andF. Sôrm. 1967. The structure of salonitenolide, a sesquiterpenic lactone of germacrane type from_Centaurea salonitana_ Vis. Collect. Czech. Chem. Comm.32: 2016.
  CAS Google Scholar
• ————. 1968. The structure and absolute configuration of scabiolide. Collect. Czech. Chem. Comm.33: 2238.
  CAS Google Scholar
• ————. 1967. Constitution and configuration of albicolide, a new germacranolide from_Jurinea albicaulis_. Collect. Czech. Chem. Comm.32: 3934.
  CAS Google Scholar
• ———,R. B. Bates, G. Snatzke andF. Sôrm. 1967. Constitution and configuration of pelenolides, a new group of sesquiterpene lactone germacranolides. Collect. Czech. Chem. Comm.32: 3917.
  CAS Google Scholar
• Sumi, M. 1958. The constitution and stereochemistry of artemisin. J. Amer. Chem. Soc.80: 4869.
  CAS Google Scholar
• Sundararaman, P., R. S. McEwen and W. Herz. 1973. Constituents of_Iva_ species. Stereochemistry of parthemollin and related xanthanolides. Tetrahedron Lett. 3809.
• Swain, T. andC. A. Williams. 1978. Heliantheae—chemical review. Page 673_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• Tada, M., Y. Moriyama, Y. Tanahashi andT. Takahashi. 1974. Furanoeremophilane6β, 10β-diol and its derivatives. New furanosesquiterpenes from_Ligularia japonica_ Less. Bull. Chem. Soc. Japan47: 1999.
  CAS Google Scholar
• -, -, -, -. 1971. New furanosesquiterpenes from_Ligularia japonica_ Less. Tetrahedron Lett. 4007.
• Takahashi, T., H. Eto, T. Ichimura and T. Murae. 1978. Hiyodorilactones A and B, new tumor inhibitory germacradienolides from_Eupatorium sachalinense_ Makino. Chem. Lett. 1345.
• Takeda, K., H. Tada and H. Minato. 1971. Components of the root of_Lindera strychnifolia_. Neosericenyl acetate and dehydrolindestrenolide. J. Chem. Soc. C: 1070.
• Tanaka, N., T. Yazawa, K. Aoyama andT. Murakami. 1976. Chemical studies on the constituents of the_Xanthium canadense_ Mill. Chem. Pharm. Bull.24: 1419; Chem. Abstr.85: 106647m (1976).
  CAS Google Scholar
• Tarasov, V. A., N. D. Abdullaev, S. Z. Kasymov andG. P. Sidyakin. 1976. Chrysartemin B, a sesquiterpene lactone from_Handelia trichophylla_. Khim. Prir. Soedin.12: 667; Chem. Abstr.86: 117598t (1977).
  Google Scholar
• -, -, -and -. 1976. Hanphyllin, a new germacranolide from_Handelia trichophylla_. Khim. Prir. Soedin. 263; Chem. Abstr.85: 143313v (1976).
• ————. 1974. Cumambrin A—a sesquiterpene lactone from_Handelia trichophylla_. Khim. Prir. Soedin.10: 799; English ed. p. 826; Chem. Abstr.82: 152142d (1975).
  Google Scholar
• ———— andM. R. Yagudaev. 1976. Structure of handelin, a new diguaianolide from_Handelia trichophylla_. Khim. Prir. Soedin.6: 745; Chem. Abstr.88: 7079h (1978).
  Google Scholar
• -,S. Z. Kasymov and G. P. Sidyakin. 1976. Sesquiterpene lactones from_Handelia trichophylla_. Khim. Prir. Soedin. 113; Chem. Abstr.85: 59573x (1976).
• ———. 1971. The structure of the sesquiterpene lactone arsubin. Khim. Prir. Soedin.7: 745; English ed. p. 722; Chem. Abstr.76: 127172g (1972).
  CAS Google Scholar
• ———. 1973. Structure and configuration of arsubin. Khim. Prir. Soedin.9: 676; English ed. p. 649.
  Google Scholar
• Taylor, R. L., L. Marchand andC. W. Crompton. 1964. Cytological observations on the_Artemisia tridentata_ (Compositae) complex in British Columbia. Canad. J. Genet. Cytol.6: 42.
  Google Scholar
• Tettweiler, K., O. Engel andE. Wedekind. 1932. Uber die Konstitution des Artemisins. Ann. Chem. Deutsch.492: 105.
  CAS Google Scholar
• Thiessen, W. E., H. Hope, N. Zarghami, D. E. Heinz, P. Deuel and E. A. Hahn. 1969. A new sesquiterpene lactone from_Centaurea solstitialis_ L. (yellow star thistle). Chem. Ind. 460.
• Thorns, H. 1891. Über einige Chemische Bestandteile der Blüten von_Chrysanthemum cinerariaefolium_. Ber. Deutsch. Pharm. Ges. 471; Chem. Zentralbl. 670, Band 2.
• Tillyaev, K. S., K. K. Khalmatov, I. Primukhamedov andM. A. Talipova. 1973. Chemical characterization of_Achillea millefolium_ growing in Uzbekistan. Rast. Resur.9: 58; Chem. Abstr.78: 121284q (1973).
  CAS Google Scholar
• Tira, S., C. Galetti andE. Mirande delle Monache. 1969. Nuclear magnetic resonance study of flavonoids. Flavones from_Antennaria dioica_. Ann. Chem. (Rome)59: 284; Chem. Abstr.71: 70882d (1969).
  CAS Google Scholar
• Tolstykh, L. P., V. I. Scheichenko, A. I. Ban’kovskii andK. S. Rybalko. 1968. Artemin—a new sesquiterpene lactone from_Artemisia taurica_. Khim. Prir. Soedin.4: 384; English ed. p. 326.
  CAS Google Scholar
• Tomassini, T. C. B. andB. Gilbert. 1972. α-cyclocostunolide and dihydro-β-cyclocostunolide from_Moquinea velutina_. Phytochemistry11: 1177.
  CAS Google Scholar
• Tomczyk, H. andW. Kisiel. 1975. Sesquiterpene lactones of_Helenium tenuifolium_. Pol. J. Pharmacol. Pharm.27: 101; Chem. Abstr.83: 4994p (1975).
  PubMed CAS Google Scholar
• Toribio, F. P. andT. A. Geissman. 1969. Sesquiterpene lactones of_Hymenoclea monogyra_. Phytochemistry8: 313.
  CAS Google Scholar
• ——. 1968. Sesquiterpene lactones. New lactone from_Hymenoclea salsola_ T. and G. Phytochemistry7: 1623.
  CAS Google Scholar
• Torrance, S. J., T. A. Geissman andM. R. Chedekel. 1969. Sesquiterpene lactones. The constituents of_Eriophyllum confertiflorum_. Phytochemistry8: 2381.
  CAS Google Scholar
• — andS. C. Steelink. 1974. New monoterpenes from_Artemisia filifolia_ Torrey. Structure, synthesis, rearrangements and biosynthesis. J. Organ. Chem. (USA)39: 1068.
  CAS Google Scholar
• Toubiana, R. 1969. Structure de l’hydroxyvernolide, nouvel ester sesquiterpenique isolée du_Vernonia colorata_ Drake. Compt. Rend. Hebd. Séances Acad. Sci. Paris, Series C268: 82.
  CAS Google Scholar
• -,and A. Gaudemer. 1967. Structure du vernolide, nouvel ester sesquiterpenique isolée de_Vernonia colorata_. Tetrahedron Lett. 1333.
• —,B. Mompon, Chi Man Ho andM. J. Toubiana. 1975. Isolement du vernodalin et du vernolepin a partir de_Vernonia guineensis_: Authenticité du squelette elemane. Phytochemistry14: 775.
  CAS Google Scholar
• -,M. J. Toubiana and B. C. Das. 1972. Structure du confertolide, nouveau germacranolide isolée de_Vernonia conferta_ (Composee). Tetrahedron Lett. 207.
• -, -,K. Tori and K. Kuriyama. 1974. Absolute configuration and conformation of confertolide, a germacranolide isolated from_Vernonia conferta_. Tetrahedron Lett. 1753.
• Tsankova, E., U. J. Kempe, T. Norin andI. Ognyanov. 1981. Apressin, a guaianolide of the endoperoxide type from_Achillea depressa_. Phytochemistry20: 1436.
  CAS Google Scholar
• Turner, B. L. 1977. Summary of the biology of the Compositae. Page 1105_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• —. 1981. New species and combinations in_Vernonia_ sections_Leiboldia_ and_Lepidonia_ (Asteraceae), with a revisional conspectus of the groups. Brittonia33: 401.
  Google Scholar
• — andA. M. Powell. 1978. Helenieae—systematic review. Page 699_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• — andM. Whalen. 1975. Taxonomic study of_Gaillardia pulchella_ (Asteraceae—Heliantheae). Wrightia5: 189.
  Google Scholar
• Tutin, T. G., K. Persson andW. Gutermann. 1976.Artemisia. Page 178_in_ T. G. Tutin, V. H. Heywood, N. A. Burges, D. M. Moore, D. H. Valentine, S. M. Walters and D. A. Webb (eds.). Flora Europaea. Vol. 4. Cambridge University Press, Cambridge.
  Google Scholar
• Usynina, R. V., L. I. Olishevets, V. V. Dudka andE. B. Martin. 1976. Lactones from_Artemisia compacta_. Khim. Prir. Soedin.6: 809; Chem. Abstr.86: 103058e (1977).
  Google Scholar
• Van Etten, C. H. andH. L. Tookey. 1979. Chemistry and biological effects of glucosinolates. Page 471_in_ G. A. Rosenthal and D. H. Janzen (eds.). Herbivores: Their interaction with secondary metabolites. Academic Press, New York.
  Google Scholar
• Vanhaelen-Fastre, R. andM. Vanhaelen. 1974. Presence of salonitenolide in_Cnicus benedictus_. Pl. Med.26: 375; Chem. Abstr.82: 108835h (1975).
  Article CAS Google Scholar
• Vichnewski, W. andB. Gilbert. 1972. Schistosomicidal sesquiterpene lactone from_Eremanthus elaeagnus_. Phytochemistry11: 2563.
  CAS Google Scholar
• —,W. Herz andN. Kumar. 1979. A lactone analogue of germacrone. J. Organ. Chem. (USA)44: 2575.
  CAS Google Scholar
• —,J. N. C. Lopes, D. D. S. Filho andW. Herz. 1976. 15-deoxygoyazensolide, a new heliangolide from_Vanillosmopsis erythropappa_. Phytochemistry15: 1775.
  CAS Google Scholar
• ————. 1976. Goyazensolide, a schistosomicidal heliangolide from_Eremanthus goyazensis_. Phytochemistry15: 191.
  CAS Google Scholar
• —,I. K. Shuhama, R. C. Rosanske andW. Herz. 1976. Granilin and ivasperin from_Ambrosia polystachya._ 13C-NMR spectra of hydroxylated isoalantones. Phytochemistry15: 1531.
  CAS Google Scholar
• —,F. Welbaneida, L. Machado, J. A. Rabi, R. Murari andW. Herz. 1977. Eregoyazin and eregoyazidin, two new guaianolides from_Eremanthus goyazensis_. J. Organ. Chem. (USA)42: 3910.
  CAS Google Scholar
• Viehoever, A. andR. G. Capen. 1963. New sources of santonin. J. Amer. Chem. Soc.45: 1941.
  Google Scholar
• Vogelzang, M. E., N. M. J. Vermeulen, D. J. J. Potgieter andH. F. Strauss. 1978. Ivalin in_Geigeria aspera_. Phytochemistry17: 2030.
  CAS Google Scholar
• Waddell, T. G. and T. A. Geissman. 1969. Paucin, a sesquiterpene lactone glucoside. Tetrahedron Lett. 515.
• ——. 1969. Sesquiterpene lactones. Constituents of_Baileya_ species. Phytochemistry8: 2371.
  CAS Google Scholar
• Wagner, H. 1978. Cynareae—chemical review. Page 1017_in_ V. H. Heywood, J. B. Harborne and B. L. Turner (eds.). The biology and chemistry of the Compositae. Vol. 2. Academic Press, London.
  Google Scholar
• —,M. A. Iyengar andW. Herz. 1972. Flavone C-glycosides in_Helenium_ species. Phytochemistry11: 446.
  CAS Google Scholar
• Watkins, S. F., J. D. Korp, I. Bernal, D. L. Perry, N. S. Bhacca andN. H. Fischer. 1978. Molecular structure of two derivatives of the germacranolide sesquiterpene lactone melnerin. J. Chem. Soc. Perkin Trans.II: 599.
  Google Scholar
• White, E. H. and R. E. K. Winter. 1963. Natural products from_Achillea lanulosa_. Tetrahedron Lett. 137.
• Wichmann, G. 1958. Biology of santonin in plants. I. The distribution of santonin and related compounds in the plant kingdom. Pharmazie Beih. Erganzungsband13: 481.
  Google Scholar
• Willuhn, G. andH. D. Herrmann. 1976. Studies on the constituents of_Arnica_ species. Two sesquiterpene lactones from the flowers of_Arnica longifolia_. Arch. Pharm.309: 333; Chem. Abstr.85: 17073d (1976).
  CAS Google Scholar
• ——. 1979. Untersuchungen über die Inhaltsstoffe von Arnica-arten. Pl. Med.37: 325.
  CAS Google Scholar
• Winters, T. E., T. A. Geissman andD. Safire. 1969. Sesquiterpene lactones of_Xanthium_ species. Xanthanol and isoxanthanol, and correlation of xanthinin with ivalbin. J. Organ. Chem. (USA)34: 153.
  CAS Google Scholar
• Witzel, D. A., G. W. Ivie andJ. W. Dollahite. 1976. Mammalian toxicity of helenalin, the toxic principle of_Helenium microcephalum_ DC. (smallhead sneezeweed). Am. J. Vet. Res.37: 859; Chem. Abstr.85: 117697d (1976).
  PubMed CAS Google Scholar
• Yabuta, G., J. S. Olsen andT. J. Mabry. 1978. Sesquiterpene lactones from the genus_Zaluzania_ (Compositae: Heliantheae). Rev. Latinoamer. Quím.9: 83.
  CAS Google Scholar
• Yamakawa, K., K. Nishitani andK. Azusawa. 1977. Chemical transformation of α-santonin into balchanin, colartin, and arbusculin A, B, C and E. Heterocycles8: 103.
  CAS Google Scholar
• Yanagita, M., S. Inayama and T. Kawamata. 1970. The stereostructures of pulchellidine and pulchellin. Tetrahedron Lett. 131.
• -, -, -,and T. Okuna. 1969. Pulchellidine, a novel sesquiterpene alkaloid isolated from_Gaillardia pulchella_ Foug. Tetrahedron Lett. 2073.
• Yoshioka, H., A. Higo, T. J. Mabry, W. Herz andG. D. Anderson. 1971. Apachin, a new sesquiterpene lactone and other xanthanolides from_Iva ambrosiaefolia_. Phytochemistry10: 401.
  CAS Google Scholar
• — andT. J. Mabry. 1969. The structure and chemistry of isabelin. A new germacranolide dilactone from_Ambrosia psilostachya_ DC. (Compositae). Tetrahedron25: 4767.
  Google Scholar
• ——,N. Dennis andW. Herz. 1970. Structure and stereochemistry of pulchellin B, C, E and F. J. Organ. Chem. (USA)35: 627.
  Google Scholar
• -, -and H. E. Miller. 1968. Isabelin, a germacranolide dilactone from_Ambrosia psilostachya_. Chem. Commun. 1679.
• —— andB. N. Timmerman. 1973. Sesquiterpene lactones: Chemistry, NMR and plant distribution. University of Tokyo Press, Tokyo.
  Google Scholar
• —W. Renold, N. H. Fischer, A. Higo andT. J. Mabry. 1970. Sesquiterpene lactones from_Ambrosia confertiflora_ (Compositae). Phytochemistry9: 823.
  Google Scholar
• -, -,and T. J. Mabry. 1970. The structure of salonitenolide and the preferential C-8 relactonization of germacranolides containing C-6 and C-8 lactonizable α-oxygen groups. Chem. Commun. 148.
• —,E. Rodríguez andT. J. Mabry. 1970. Tetraneurin-E and -F. New C-15 oxygenated pseudoguaianolides from_Parthenium_ (Compositae). J. Organ. Chem. (USA)35: 2888.
  Google Scholar
• —,H. Rüesch, E. Rodríguez, A. Higo, T. J. Mabry, J. G. Galzada Alan andX. A. Domínguez. 1970. Tetraneurin-B, -C and -D, new C14-oxygenated pseudoguaianolides from_Parthenium_ (Compositae). Tetrahedron26: 2167.
  Google Scholar
• Yoshitake, A. andT. A. Geissman. 1969. Sesquiterpene lactones of_Baileya_ species. Pleniradin and radiatin. Phytochemistry8: 1753.
  CAS Google Scholar
• Yunusov, A. I., N. D. Abdullaev, S. Z. Kasymov and G. P. Sidyakin. 1976. Tanachin, a new sesquiterpene lactone from_Tanacetum pseudoachillea_. Khim. Prir. Soedin. 263; Chem. Abstr.85: 177643t (1976).
• -, -, -, -,and M. R. Yagudaev. 1976. Structure of tanachin. Khim. Prir. Soedin. 462; Chem. Abstr.85: 177660w (1976).
• -,S. Z. Kasymov and G. P. Sidyakin. 1976. Tanapsin from_Tanacetum pseudoachillea_. Khim. Prir. Soedin. 261; Chem. Abstr.85: 117642s (1976).
• ———. 1973. Lactones of_Tanacetum pseudoachillea_. Khim. Prir. Soedin.9: 276; English ed. p. 267; Chem. Abstr.78: 159898f (1973).
  Google Scholar
• ———. 1975. Tanacin, a new germacranolide from_Tanacetum pseudoachillea_. Khim. Prir. Soedin.11: 262; Chem. Abstr.83: 59097d (1975).
  CAS Google Scholar
• —,G. P. Sidyakin andD. Kurbanov. 1978. Cumambrins A and B from_Tanacetum santolina_. Khim. Prir. Soedin.5: 656; Chem. Abstr.90: 51410z (1979).
  Google Scholar
• Yusupov, M. I., S. Z. Kasymov, N. D. Abdullaev, G. P. Sidyakin andM. R. Yagudaev. 1977. A new lactone, isoridentin, from_Achillea biebersteinii_. Khim. Prir. Soedin.13: 800; English ed. p. 674.
  Google Scholar
• -,A. Mallabaev and G. P. Sidyakin. 1976. Lactones of_Achillea biebersteinii_. Khim. Prir. Soedin. 396; Chem. Abstr.85: 106654m (1976).
• Zakharov, P. I., P. B. Terent’ev, O. A. Konovalova andK. S. Rybalko. 1977. Mass spectrometric study of the sesquiterpene lactone grossmizin and its derivatives. Khim. Prir. Soedin.3: 344; Chem. Abstr.87: 184707m (1977).
  Google Scholar
• Zakirov, S. K., S. Z. Kasymov, N. D. Abdullaev andG. P. Sidyakin. 1975. The structure of maximolide. Khim. Prir. Soedin.11: 261; English ed. p. 273.
  CAS Google Scholar
• -, -,V. Rakhmankulov and G. P. Sidyakin. 1976. Lactones of_Artemisia ashurbajevii_. Khim. Prir. Soedin. 397; Chem. Abstr.85: 106655n (1976).
• —— andG. P. Sidyakin. 1976. Sesquiterpene lactones from_Jurinea maxima_. Khim. Prir. Soedin.11: 656; English ed. p. 690; Chem. Abstr.84: 71430k (1976).
  Google Scholar
• ———. 1974. Lactones of_Jurinea maxima_. Khim. Prir. Soedin.10: 255; Chem. Abstr.81: 74890j (1974).
  CAS Google Scholar
• Zarghami, N. and D. E. Heinz. 1969. Solstitialin acetate. 1969. A sesquiterpene lactone from_Centaurea solstitialis_ L. (yellow star thistle). Chem. Ind. 1556.
• Zdero, C., F. Bohlmann, H. Robinson andR. M. King. 1980. Neue Furanoeremophilanes aus_Gynoxys dielsiana_. Phytochemistry19: 975.
  CAS Google Scholar
• ————. 1981. Germacranolides from_Proteopsis argentea_. Phytochemistry20: 739.
  CAS Google Scholar
• Bohlmann, F. andA. Suwita. 1977. Neue furanoeremophilane aus_Ligularia vorobierii_ Worosh. Chem. Ber.110: 1759.
  CAS Google Scholar