title: Four new flavonol glycosides from the leaves of Astragalus caprinus.
abstract: Four new flavonol 3-O-glycosides were isolated from the leaves of Astragalus caprinus. Their structures were elucidated by spectroscopic methods as rhamnocitrin-3-O-[3-hydroxy-3-methylglutaroyl(1-->6)][beta-D-apiofuranosyl(1-->2)]-beta-D-galactopyranoside (1), rhamnetin-3-O-[3-hydroxy-3-methylglutaroyl(1-->6)][beta-D-apiofuranosyl(1-->2)]-beta-D-galactopyranoside (2), kaempferol-3-O-[beta-D-xylopyranosyl(1-->3)-alpha-L-rhamnopyranosyl(1-->6)]-beta-D-galactopyranoside (3), and quercetin-3-O-[beta-D-xylopyranosyl(1-->3)-alpha-L-rhamnopyranosyl(1-->6)][beta-D-apiofuranosyl(1-->2)]-beta-D-galactopyranoside (4).
authors.affiliation: Laboratoire de Phytochimie et Biologie Micromoleculaire and Centre de RMN, UCB-ESCPE, UPRESA CNRS 5012, Université Claude Bernard, 43 Bd. 11 Novembre, 69622 Villeurbanne, France. Nabilsemmar@hotmail.com
authors.forename: Nabil
authors.initials: N
authors.lastname: Semmar
authors.forename: Bernard
authors.initials: B
authors.lastname: Fenet
authors.forename: Katia
authors.initials: K
authors.lastname: Gluchoff-Fiasson
authors.forename: Aurangzeb
authors.initials: A
authors.lastname: Hasan
authors.forename: Maurice
authors.initials: M
authors.lastname: Jay
mesh_terms: D007887:Fabaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014416:Tunisia
chemical_list: D005419:Flavonoids; D006027:Glycosides