title: Cycloartane triterpene glycosides from Astragalus trigonus.
abstract: Three new cycloartane glycosides, trigonoside I, II and III, and the known astragalosides I and II were isolated from the roots of Astragalus trigonus. The structures of the new glycosides were totally elucidated by high field (600 MHz) NMR analyses as cycloastragenol-6-O-beta-xylopyranoside, cycloastragenol-3-O-[alpha-L-arabinopyranosyl(1-->2)-beta-D- xylopyranosyl]- 6-O-beta-D-xylopyranoside and cycloastragenol-3-O-[alpha-L-arabinopyranosyl (1-->2)-beta-D-(3-O-acetyl)-xylopyranosyl]-6-O-beta-D-xylopyranoside.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Camerino, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Gariboldi
authors.forename: F
authors.initials: F
authors.lastname: Pelizzoni
authors.forename: M
authors.initials: M
authors.lastname: Tatò
authors.forename: L
authors.initials: L
authors.lastname: Verotta
authors.forename: N
authors.initials: N
authors.lastname: el-Sebakhy
authors.forename: A M
authors.initials: AM
authors.lastname: Asaad
authors.forename: R M
authors.initials: RM
authors.lastname: Abdallah
authors.forename: S M
authors.initials: SM
authors.lastname: Toaima
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D007887:Fabaceae; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010946:Plants, Medicinal; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D012503:Saponins; D014315:Triterpenes