title: Triterpenoid saponins from Astragalus trigonus.
abstract: One new, 3-O-[[[-alpha-L-rhamnopyranosyl-(1-->2)]-[beta-D-glucopyranosyl-(1-->3)]-beta-D-glucopyranosyl-(1-->2)]-beta-D-glucuronopyranosyl]-3beta,22alpha,24-trihydroxyolean-12-ene and two known triterpenoid saponins, 3-O-[[alpha-L-rhamnopyranosyl-(1-->2)]-[beta-D-glucopyranosyl-(1-->2)]-beta-D-glucuronopyranosyl]-3beta,22beta,24-trihydroxyolean-12-ene (azukisaponin V) and 3,16-di-O-beta-D-glucopyranosyl-3beta,6alpha,16beta-trihydroxycycloart-24-ene have been isolated from Astragalus trigonus. The structures were determined primarily by NMR spectroscopy. The assignment of NMR signals was performed by means of 1H-1H COSY, NOESY, ROESY, TOCSY, HMQC and HMBC experiments.
authors.affiliation: University of Bayreuth, Organic Chemistry I/2, Germany.
authors.forename: K H
authors.initials: KH
authors.lastname: Shaker
authors.forename: M
authors.initials: M
authors.lastname: Bernhardt
authors.forename: M H
authors.initials: MH
authors.lastname: Elgamal
authors.forename: K
authors.initials: K
authors.lastname: Seifert
mesh_terms: D002240:Carbohydrate Sequence; D002845:Chromatography; D004534:Egypt; D007887:Fabaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D008968:Molecular Conformation; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000737:chemistry / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D012822:Silicon Dioxide; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D009844:Oligosaccharides; D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes; D012822:Silicon Dioxide