title: Two new steroidal saponins from Tribulus terrestris L.
abstract: Two new steroidal saponins were isolated from the fruits of Tribulus terrestris L. Their structures were elucidated by spectroscopic and chemical analysis as (23S,24R,25R)-5alpha-spirostane-3beta,23,24-triol-3-O-{alpha-L-rhamnopyranosyl-(1 --> 2)-[beta-D-glucopyranosyl-(1 --> 4)]-beta-D-galactopyranoside} (1) and (23S,24R,25S)-5alpha-spirostane-3beta,23,24-triol-3-O-{alpha-L-rhamnopyranosyl-(1 --> 2)-[beta-D-glucopyranosyl-(1 --> 4)]-beta-D-galactopyranoside} (2).
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.forename: Xuan
authors.initials: X
authors.lastname: Lu
authors.forename: Biao
authors.initials: B
authors.lastname: Wu
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: Hua
authors.forename: Yue-Hu
authors.initials: YH
authors.lastname: Pei
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D005638:Fruit / Q000737:chemistry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013150:Spirostans / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism; D032444:Tribulus / Q000737:chemistry*
chemical_list: C549256:5alpha-spirostane-3beta,23,24-triol-3-O-(alpha-L-rhamnopyranosyl-(1 -2))-(beta-D-glucopyranosyl-(1-4)-beta-D-galactopyranoside); D004365:Drugs, Chinese Herbal; D012503:Saponins; D013150:Spirostans