title: Triterpenoid saponins from Clematis tangutica.
abstract: Two new triterpenoid saponins, tanguticoside A and B along with seven known saponins vitalboside B, alpha-hederin, saponin PK, beta-hederin, saponin PJ3, saponin PE, and ciwujianoside A were isolated from aerial part of Clematis tangutica. By chemical and spectral evidences methods, the structures of tanguticoside A and B were elucidated as 3-O-beta-D-glucopyranosylhederagenin 28-O-alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranoside and 3-O-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosylhederagenin 28-O-alpha-D-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranoside, respectively.
authors.forename: H M
authors.initials: HM
authors.lastname: Zhong
authors.forename: C X
authors.initials: CX
authors.lastname: Chen
authors.forename: X
authors.initials: X
authors.lastname: Tian
authors.forename: Y X
authors.initials: YX
authors.lastname: Chui
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Chen
mesh_terms: D004365:Drugs, Chinese Herbal; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D008516:Medicine, Chinese Traditional; D015394:Molecular Structure; D008517:Phytotherapy; D010946:Plants, Medicinal; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D004365:Drugs, Chinese Herbal; D012503:Saponins; D014315:Triterpenes