Studies on the Constituents of Amaranthus caudatus Leaves: Isolation and Structure Elucidation of New Triterpenoid Saponins and Ionol-Derived Glycosides (original) (raw)
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Phytochemistry, 1998
Four new saponins\ 2!b!O!ða!L!rhamnopyranosyl"0 : 2#!b!glucuronopyranosylŁ!1b\2b!dihy! droxyolean!01!en!17!oic acid 17!O!ðb!D!glucopyranosylŁ ester\ 2!b!O!ða!L!rhamnopyranosyl"0 : 2#!b!glu! curonopyranosylŁ!1b\2b\12!trihydroxyolean!01!en!17!oic acid 17!O!ðb!D!glucopyranosylŁ ester\ 2!b!O!ða! rhamnopyranosyl"0 : 2#!b!glucuronopyranosylŁ!1b\2b!dihydroxy!12!oxoolean!01!en!17!oic acid 17!O!ðb!D! glucopyranosylŁ ester\ 2!b!O!ðb!glucuronopyranosylŁ!1b\2b!dihydroxy!29!norolean!01\19"18#!diene!12\17! dioic acid 17!O!ðb!D!glucopyranosylŁ ester\ together with known chondrillasterol "4a!stigmasta!6\11!dien!2b! ol# and its 2!O!glucopyranoside have been isolated from seeds of Amaranthus cruentus[ The structures were established by LSI mass spectrometry and NMR spectroscopy[ Þ 0887 Elsevier Science Ltd[ All rights reserved
Sapogenin from Leaves of Amaranthus cruentus
1998
SUMMARY. The nutritional quality and haemolytic activity of Amarantlzus cruentus leaves is well-known. Sapogenins present in these leaves were identified by the separation technique of Penafiel and Diaz de Villar. After purification by silica gel column chromatography 0.47 g of oleanolic acid was obtained (yield: 22.3%). The structure of oleanolic acid was determined by the combination of IR, ~H/'~C NMR and MS spectroscopy. The glycone moiety (rhamnose) was identified by comparison (paper chromatography) with an authentic sample. RESUMEN. "Sapogeninas de hojas de Amaranthus cruentus". Coriocida la calidad nutricional de las hojas de Amaranthus cruentus y habiendose detectado alta actividad hemolitica, se buscaron las sapogeninas presentes. La tecnica de separacion usada fue la de Penafiel y Diaz de Villar, obteniendose luego de purificacion a traves de cromatografia en columna de gel de silice 0,47 g de acido oleanolico (rendimiento: 22,3%). La estructura del aglicon s...
Unusual sesquiterpene glucosides from Amaranthus retroflexus
Tetrahedron, 2006
Implementing the phytochemical study of the weed Amaranthus retroflexus, four new sesquiterpene glucosides were isolated from the methanolic extract of the plant. The structures of these metabolites are determined on the basis of the mass spectrometry, and 1D and 2D NMR spectroscopies (DQ-COSY, TOCSY, HSQC, HSQC-TOCSY, HMBC, and NOESY). Two compounds are characterized by a new aglycone and differed from the site of glucosylation. The other two compounds are dimeric diastereoisomers. All the glucoside sesquiterpenes were tested on the wild species Taraxacum officinale to evaluate the role of this weed in the habitat and on the seed of A. retroflexus to verify the potential autotoxic effect of the plant.
Chemical constituents of Amaranthus viridis L.
Chemistry of Natural Compounds, 2015
Chemical investigation of the dichloromethane extracts of Amaranthus viridis L. afforded squalene, trilinolein, polyprenol and phytol from the leaves; spinasterol and squalene from the stems; and spinasterol from the roots. Their structures were identified by comparison of their 1H and/or 13C NMR data with those reported in the literature.
Preliminary phytochemical analysis of Amaranthus polygonoides
Phytochemicals are certain non-nutritive plant chemicals which have some disease preventive properties. The given five extract aqueous, chloroform , chloroform and ethyl acetate, Acetone and aqueous and n-butyl alcohol extracts of leaves of the fresh Amarathus polygonoides were screened for the presence of different phytochemical by standard procedure . The present study indicates that the fresh plant contains different classes of secondary metabolites such as alkaloids , steroids , flavonoids , tri terpenoids , anthraquinones , saponins , cardiac glycosides, tannins and reducing sugar . The presence of these secondary metabolites signifies the potential of Amarathus polygonoides as a source of therapeutic agent. Therefore,it is of interest to investigate the phytochemical constituents of the Indian medicinal plant Amaranthus polygonoides.
GC-MS analysis and phytochemical screening of chloroform extract of Amaranthus viridis
J. Indian bot. Soc., 2022
Plant chemistry or Phytochemistry is a part of science, deals with chemical nature of the plant or plant products. Phytotherapy goes about as a wellspring of treating and working on specific infections by utilizing the useful impacts of restorative plants. Phytochemicals are the bioactive, regular chemical compounds, found in plants. The plant contains a wide assortment of compounds and they are comprehensively grouped into two kinds, primary and secondary constituents or metabolites. Primary constituents include chlorophyll, proteins, sugar and amino acids while secondary metabolites contain terpenoids, Saponins, Tannins, and alkaloids. Because of the presence of these secondary constituent's therapeutic plants show antifungal, antibacterial and against aggravation exercises. Various parts, for example, leaves, bark, seeds, roots, blossoms and cases of plants likewise have different quality and amount of dynamic constituent. Amaranthus viridis L. (Family Amaranthaceae) is distributed in the hotter regions of the planet. Moreover, the entire plant has pain relieving and against pyretic properties and is utilized for the treatment of torment and fever separately in customary or traditional frameworks of medication (Eluwa 1977). It is not easy to grow, supplement rich and underutilized pseudocereal that can assume a significant part in activities against hunger and lack of healthy sustenance that happen because of low precipitation conditions (Martha and Shimelis 2012). Amaranth has a high resistance to arid conditions and sterile soils where customary cereals can't be developed. As indicated by Monica et al. Amaranth has been promoted as a supernatural occurrence grain, a super grain, and the grain of things to come (Monica et al. 2012). A. viridis is perhaps of Asian beginning yet presently a cosmopolitan weed in the tropical and subtropical Abstract Plants have biological compounds which are utilized for treating different human ailments and furthermore assume a significant part in relieving. Amaranthus viridis is utilized as traditional medication in the treatment of fever, torment, asthma, diabetes, loose bowels, urinary problems, liver issues, eye issues and venereal sicknesses. Consequently, it is important to research the phytochemical constituents of the Indian therapeutic plant Amaranthus viridis. This study was intended to assess the phytochemical discoveries for the presence of Alkaloids, Coumarins, Steroids, Saponins, Tannins, Flavonoids, Phenols, and Terpenoids. The phytochemical profile of chloroform concentrates of leaves of Amaranthus viridis were dissected utilizing GC-MS (Gas Chromatography-Mass Spectrometry) technique.The leaves were dried, powdered, and extracted with chloroform by using Soxhlet apparatus, then subjected to GC-MS analysis by using Clarus GCMS-QP 2010 Ultra Gas chromatography. The unknown range was contrasted and that of the known by utilizing NIST (National Institute of Standards and Technology) information base, which uncovered the presence of various phytochemicals in the extract. The compounds are pharmacologically and naturally significant.
Phytochemicals are non-nutritive, chemical compounds that occur naturally in plants and have diverse protective properties. There is currently an upsurge of interest in phytochemicals as a new source of natural pharmaceutical agents to be used in foods and pharmaceutical preparations to replace synthetic medicines, which are being restricted due to their potential health risks and toxicity. Thus, the objective of the present investigation was to actuate the biochemical components of Amaranthus hybridus using Perkin Elmer Gas Chromatography-Mass Spectrometry techniques. Amaranthus hybridus belonging to family Amaranthaceae is an annual Indian herb, is a tall herb with clusters of dark pink flowers. Methanolic extracts of Amaranthus hybridus was used for the qualitative phytochemical screening. Standard phytochemical screening tests were conducted for selected plant species and found that extract contains a variety of phytochemicals. Perkin Elmer Gas Chromatography-Mass Spectrometry technique was used to chemically identify important bioactive compounds isolated from methanolic extract of Amaranthus hybridus. Present investigation revealed that GC-MS analysis of methanolic extract of Amaranthus hybridus confess the existence 28 compounds at 36 different peaks. Many compounds were presented such as Squalene, n-Hexadecanoic acid, 9,12-octadecadienoic acid (Z, Z)-, methyl ester, Chondrillasterol, 6-Octadecenoic acid, methyl ester, (Z)-, 1,3-Propanediol, 2-(hydroxymethyl)-2-nitro-,Pentacosane, Tetracontane, Pentatriacontane and Benzenepropanoic acid. The present study provided evidence to approve the existence of various medicinally important bioactive compounds or phytochemicals that has got biological importance and it rationalizes their use in the traditional drugs for the treatment of different ailments.
Triterpene saponins from Nigella sativa L
2005
Three known triterpene glycosides were isolated from the MeOH extract of dried and powdered seeds of Nigella sativa. The structures of the compounds were established as 3-O-[β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl]-28-O-[α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl]-hederagenin (1), 3-O-[α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl]-28-O-[α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl]-hederagenin (2), and 3-O-[β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl]-hederagenin (3) by means of chemical and spectral methods. Compound 2 was isolated for the first time from the genus Nigella.
Determination of Proximate, Phytochemicals and Minerals Composition of Amaranthus spp
2021
Vegetables are major sources of vitamins, minerals and bioactive components such phytochemicals and antioxidant that help in reducing the risk of diseases. The aim of the study was to determine the proximate composition, phytochemical screening and mineral composition of Amaranthus spp. leaf extract. The proximate composition and phytochemical screening were determined using conventional laboratory methods while the mineral composition of the leaves was determines using atomic absorption spectrophotometer. The proximate analysis of the leaf extract showed that it contains carbohydrate (48.6%), protein (18.2%), fats (5.4%), crude fibre (10.6%), moisture content (8.3%) and ash content (13.3%). The preliminary phytochemical screening of Amaranthus spp. leaf extract revealed the presence of Alkaloid, terpenoid, flavonoids, steroid, phenol, saponins and tannin. Quantitative phytochemical analysis of the extract showed that the flavonoids is the most abundant constituent in making about 1...
Triterpenoid saponins from the roots of tea plant ( Camellia sinensis var. assamica
Phytochemistry, 2000
Three olean-12-ene type triterpenoid saponins, named TR-saponins A, B and C, were isolated as methyl esters from tea roots (Camellia sinensis var. assamica ) after treatment with diazomethane. Their structures were established as the methyl esters of 3-O-a-L-arabinopyranosyl (1 4 3)-b-D-glucuronopyranosyl-21, 22-di-O-angeloyl-R 1 -barrigenol-23-oic acid, 3-O-a-Larabinopyranosyl (1 4 3)-b-D-glucuronopyranosyl-21-O-angeloyl-22-O-2-methylbutanoyl-R 1 -barrigenol-23-oic acid and 3-O-a-Larabinopyranosyl (1 4 3)-b-D-glucuronopyranosyl-16a-O-acetyl-21-O-angeloyl-22-O-2-methylbutanoyl-R 1 -barrigenol-23-oic acid, 2 by extensive 1D and 2D-NMR as well as FABMS and HR-MS analyses. 7