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Papers by Eckhard Wollenweber

Research paper thumbnail of 5-Hydroxy-6,2'-dimethoxyflavone from Primula denticulata

岐阜藥科大學紀要 the Annual Proceedings of Gifu College of Pharmacy, Jun 30, 1991

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Research paper thumbnail of A Novel C-Methyl Isoflavone from Abronia latifolia

Natural Product Letters, 1993

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Research paper thumbnail of Salvigenin und ein neues nat�rliches flavon aus den knospen von alnus japonica

Tetrahedron Lett, 1972

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Research paper thumbnail of Methyl�ther des myricetins, quercetins und k�mpferols im knospen�l von aesculus hippocastanum

Tetrahedron Lett, 1970

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Research paper thumbnail of Flavonols from the fronds of Pityrogramma chrysoconica

Phytochemistry, 1972

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Research paper thumbnail of Flavones and flavonols in exudate of Salvia glutinosa

Phytochemistry, 1974

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Research paper thumbnail of Le bétulétol (dihydroxy-5,7 diméthoxy-4′,6 flavonol) et le méthyl-3 bétulétol, nouveaux composés naturels, extraits de Betula ermanii Cham

Biochimie, 1971

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Research paper thumbnail of Characterization of Two O .-Methyltransferase-like Genes in Barley and Maize*

Pharmaceutical Biology, 2008

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Research paper thumbnail of Flavonoids and terpenoids from the resinous exudates of Madia species (Asteraceae, Helenieae)

Zeitschrift für Naturforschung. C, Journal of biosciences

The resinous material accumulated on aerial parts of Madia species is shown to consist mainly of ... more The resinous material accumulated on aerial parts of Madia species is shown to consist mainly of diterpenes, containing a series of flavonoid aglycones. A6- and/or 8-O-substitution is characteristic for many of these flavonoids. Three known rare diterpenes were found and the structure elucidation of a diterpene with a new carbon skeleton, named madiaol, is reported.

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Research paper thumbnail of Biological Effects of Epicuticular Flavonoids from Primula denticulata on Human Leukemia Cells

Journal of Agricultural and Food Chemistry, 2004

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Research paper thumbnail of Exudate Flavonoids of Eight Species of Ceanothus (Rhamnaceae)

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Research paper thumbnail of Exkret-Flavonoide bei Hieracium intybaceum (Asteraceae), einem alpinen Habichtskraut

Zeitschrift Fur Naturforschung Section C Biosciences, 1984

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Research paper thumbnail of 8,2'-Dihydroxyflavone from Primula pulverulenta

岐阜藥科大學紀要, Jun 30, 1989

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Research paper thumbnail of Flavonoid aglycones from the leaf surfaces of some Labiatae species

Plant Systematics and Evolution, 1990

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Research paper thumbnail of On the occurrence of exudate flavonoids in the Borage family (Boraginaceae)

Zeitschrift Fur Naturforschung C, 2002

Externally accumulated flavonoid aglycones have been found for the first time in Nonea species. T... more Externally accumulated flavonoid aglycones have been found for the first time in Nonea species. They exhibit only flavones, one of them being the rare tricetin-4'-methyl ether. Within the subfamily Boraginoideae, exudate flavonoids appear to be a rare character.

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Research paper thumbnail of Chemodiversity of Exudate Flavonoids in Cassinia and Ozothamnus (Asteraceae, Gnaphalieae)

Zeitschrift Fur Naturforschung C, 2008

The lipophilic exudates deposited on aerial parts of four species of Cassinia and twelve species ... more The lipophilic exudates deposited on aerial parts of four species of Cassinia and twelve species of Ozothamnus (Asteraceae, Gnaphalieae) have been analyzed for the presence of flavonoid aglycones and some other phenolics. A total of 55 flavonoids were identified, including several rare flavonols. Flavonols are prevailing over flavones, and 8-O-substitution is dominant in both groups. Ozothamnus rosmarinifolius is exceptional in producing several coumarins. Four dihydrobenzofurans have also been identified from this species. Cluster analysis and principal coordinate analysis of the flavonoid data provide support for combining species of Cassinia and Ozothamnus into a single genus.

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Research paper thumbnail of 5,2', 5'-Trihydroxyflavone and 2', β-dihydroxychalcone from Primula pulverulenta

岐阜藥科大學紀要, Jun 30, 1990

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Research paper thumbnail of HPLC Separation of O -Acylated Flavonoids and Biflavones from Some Species of Gymnospermae

Chromatographia, 2004

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Research paper thumbnail of Novel epicuticular leaf flavonoids from Kalmia and Gaultheria (Ericaceae)

Zeitschrift Fur Naturforschung Section C Biosciences, 1984

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Research paper thumbnail of Exudate flavonoids in some gnaphalieae and inuleae (Asteraceae)

Zeitschrift Fur Naturforschung C a Journal of Biosciences, 2005

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Research paper thumbnail of 5-Hydroxy-6,2'-dimethoxyflavone from Primula denticulata

岐阜藥科大學紀要 the Annual Proceedings of Gifu College of Pharmacy, Jun 30, 1991

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Novel C-Methyl Isoflavone from Abronia latifolia

Natural Product Letters, 1993

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Salvigenin und ein neues nat�rliches flavon aus den knospen von alnus japonica

Tetrahedron Lett, 1972

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Methyl�ther des myricetins, quercetins und k�mpferols im knospen�l von aesculus hippocastanum

Tetrahedron Lett, 1970

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Flavonols from the fronds of Pityrogramma chrysoconica

Phytochemistry, 1972

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Research paper thumbnail of Flavones and flavonols in exudate of Salvia glutinosa

Phytochemistry, 1974

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Research paper thumbnail of Le bétulétol (dihydroxy-5,7 diméthoxy-4′,6 flavonol) et le méthyl-3 bétulétol, nouveaux composés naturels, extraits de Betula ermanii Cham

Biochimie, 1971

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Characterization of Two O .-Methyltransferase-like Genes in Barley and Maize*

Pharmaceutical Biology, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Flavonoids and terpenoids from the resinous exudates of Madia species (Asteraceae, Helenieae)

Zeitschrift für Naturforschung. C, Journal of biosciences

The resinous material accumulated on aerial parts of Madia species is shown to consist mainly of ... more The resinous material accumulated on aerial parts of Madia species is shown to consist mainly of diterpenes, containing a series of flavonoid aglycones. A6- and/or 8-O-substitution is characteristic for many of these flavonoids. Three known rare diterpenes were found and the structure elucidation of a diterpene with a new carbon skeleton, named madiaol, is reported.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Biological Effects of Epicuticular Flavonoids from Primula denticulata on Human Leukemia Cells

Journal of Agricultural and Food Chemistry, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Exudate Flavonoids of Eight Species of Ceanothus (Rhamnaceae)

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Exkret-Flavonoide bei Hieracium intybaceum (Asteraceae), einem alpinen Habichtskraut

Zeitschrift Fur Naturforschung Section C Biosciences, 1984

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Research paper thumbnail of 8,2'-Dihydroxyflavone from Primula pulverulenta

岐阜藥科大學紀要, Jun 30, 1989

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Research paper thumbnail of Flavonoid aglycones from the leaf surfaces of some Labiatae species

Plant Systematics and Evolution, 1990

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Research paper thumbnail of On the occurrence of exudate flavonoids in the Borage family (Boraginaceae)

Zeitschrift Fur Naturforschung C, 2002

Externally accumulated flavonoid aglycones have been found for the first time in Nonea species. T... more Externally accumulated flavonoid aglycones have been found for the first time in Nonea species. They exhibit only flavones, one of them being the rare tricetin-4'-methyl ether. Within the subfamily Boraginoideae, exudate flavonoids appear to be a rare character.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Chemodiversity of Exudate Flavonoids in Cassinia and Ozothamnus (Asteraceae, Gnaphalieae)

Zeitschrift Fur Naturforschung C, 2008

The lipophilic exudates deposited on aerial parts of four species of Cassinia and twelve species ... more The lipophilic exudates deposited on aerial parts of four species of Cassinia and twelve species of Ozothamnus (Asteraceae, Gnaphalieae) have been analyzed for the presence of flavonoid aglycones and some other phenolics. A total of 55 flavonoids were identified, including several rare flavonols. Flavonols are prevailing over flavones, and 8-O-substitution is dominant in both groups. Ozothamnus rosmarinifolius is exceptional in producing several coumarins. Four dihydrobenzofurans have also been identified from this species. Cluster analysis and principal coordinate analysis of the flavonoid data provide support for combining species of Cassinia and Ozothamnus into a single genus.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of 5,2', 5'-Trihydroxyflavone and 2', β-dihydroxychalcone from Primula pulverulenta

岐阜藥科大學紀要, Jun 30, 1990

Bookmarks Related papers MentionsView impact

Research paper thumbnail of HPLC Separation of O -Acylated Flavonoids and Biflavones from Some Species of Gymnospermae

Chromatographia, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel epicuticular leaf flavonoids from Kalmia and Gaultheria (Ericaceae)

Zeitschrift Fur Naturforschung Section C Biosciences, 1984

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Exudate flavonoids in some gnaphalieae and inuleae (Asteraceae)

Zeitschrift Fur Naturforschung C a Journal of Biosciences, 2005

Bookmarks Related papers MentionsView impact

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