title: New pregnane and steroidal glycosides from Tribulus terrestris L.
abstract: Three new steroidal saponins were isolated from the fruits of Tribulus terrestris L. Their structures were elucidated by spectroscopic and chemical analysis as 16beta-(4'-methyl-5'-O-beta-D-glucopyranosyl-pentanoxy)-5alpha-pregn-3beta-ol-12,20-dione-3-O-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucopyranosyl-(1 --> 4)-beta-D-galactopyranoside (1), 2alpha,3beta-dihydroxy-5alpha-pregn-16-en-20-one 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-galactopyranoside (2) and 26-O-beta-D-glucopyranosyl-(25R)-5alpha-furostan-20(22)-en-2alpha,3beta,26-triol-3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-galactopyranoside (3).
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Guo-Qing
authors.initials: GQ
authors.lastname: Yi
authors.forename: Jian-Kun
authors.initials: JK
authors.lastname: Xu
authors.forename: Tian-Long
authors.initials: TL
authors.lastname: Zhang
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; D011278:Pregnanes / Q000737:chemistry / Q000302:isolation & purification*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism; D032444:Tribulus / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D011278:Pregnanes; D012503:Saponins