title: Saponins from Vietnamese ginseng, Panax vietnamensis Ha et Grushv. collected in central Vietnam. III.
abstract: Five new dammarane saponins derived from four new aglycones were isolated from the rhizomes and roots of Panax vietnamensis Ha et Grushv. On the basis of physicochemical and spectral evidence, the structures of these compounds were established as 6-O-beta-D-glucopyranosyl 20(S),25-epoxydammarane-3 beta,6 alpha,12 beta,24 alpha-tetrol (1), 6-O-beta-D-xylopyranosyl-(1-->2)-beta-D-glucopyranosyl 20(S),25-epoxydammarane-3 beta,6 alpha,12 beta,24 alpha-tetrol (2), 6-O-beta-D-glucopyranosyl dammarane-3 beta,6 alpha,12 beta,20(S),24 xi,25-hexol (5), 3-O-[beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl]-20-O-beta-D- glucopyranosyl dammarane-3 beta,12 beta,20(S),24 xi,25-pentol (8) and 6-O-beta-D-xylopyranosyl-(1-->2)-beta-D-glucopyranosyl 20(S),24(S)-epoxydammarane-3 beta,6 alpha,12 beta,25 xi,26-pentol (10). The trivial names, vina-ginsenoside-R10, -R11, -R12, -R13 and -R14, respectively, were assigned to the new saponins.
authors.affiliation: Science-Production Centre of Vietnamese Ginseng, Ho Chi Minh City University of Medicine and Pharmacy.
authors.forename: N M
authors.initials: NM
authors.lastname: Duc
authors.forename: R
authors.initials: R
authors.lastname: Kasai
authors.forename: K
authors.initials: K
authors.lastname: Ohtani
authors.forename: A
authors.initials: A
authors.lastname: Ito
authors.forename: N T
authors.initials: NT
authors.lastname: Nham
authors.forename: K
authors.initials: K
authors.lastname: Yamasaki
authors.forename: O
authors.initials: O
authors.lastname: Tanaka
mesh_terms: D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D005894:Panax / Q000737:chemistry*; D010946:Plants, Medicinal; D012503:Saponins / Q000032:analysis*; D014744:Vietnam
chemical_list: D012503:Saponins