Two new glycosides from Astragalus caprinus.
A new glycoside of flavonol (1) and a new glycoside of a cycloartane-type triterpene (2) were isolated from the leaves and the roots of Astragalus caprinus, respectively. Their structures were elucidated in turn by spectroscopic data interpretation as 3-O-[[beta-D-xylopyranosyl(1-->3)-alpha-L-rhamnopyranosyl(1-->6)][beta-D-apiofuranosyl(1-->2)]]-beta-D-galactopyranosyl kaempferol (1) and 3-O-(beta-D-xylopyranosyl)-24-O-(beta-D-glucopyranosyl)-20,25-epoxycycloartane-3beta,6alpha,16beta,24alpha-tetrol (2).
Semmar
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Laboratoire de Phytochimie et Biologie Moléculaire, Université Claude Bernard, 43 Bd. 11 Novembre, 69622 Villeurbanne, France. Nabilsemmar@hotmail.com
Fenet
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B
Lacaille-Dubois
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MA
Gluchoff-Fiasson
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Chemli
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Jay
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D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification; D014416:Tunisia
C433959:3-O-((xylopyranosyl(1-3)-rhamnopyranosyl(1-6))(apiofuranosyl(1-2)))-galactopyranosyl kaempferol; C433960:3-O-(beta-D-xylopyranosyl)-24-O-(beta-D-glucopyranosyl)-20,25-epoxy-cycloartane-3beta,6alpha,16beta,24alpha-tetrol; D005419:Flavonoids; D006027:Glycosides; D044949:Kaempferols; D012503:Saponins; D014315:Triterpenes