title: A new triterpenoid saponin from Gymnema sylvestre.
abstract: Besides four known compounds, a new triterpenoid saponin was isolated from the stems of Gymnema sylvestre. The structure of the new triterpenoid saponin was established as 3β,16β,22α-trihydroxy-olean-12-ene 3-O-β-D-xylopyranosyl-(1 → 6)-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranoside (1) on the basis of 1D and 2D NMR techniques, including COSY, HMBC, HMQC, and NOESY correlations. Four known compounds 2, 3, 4, and 5 were identified on the basis of spectroscopic data.
authors.affiliation: School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China.
authors.forename: Man-Qi
authors.initials: MQ
authors.lastname: Zhang
authors.forename: Yue
authors.initials: Y
authors.lastname: Liu
authors.forename: Sheng-Xu
authors.initials: SX
authors.lastname: Xie
authors.forename: Tun-Hai
authors.initials: TH
authors.lastname: Xu
authors.forename: Tong-Hua
authors.initials: TH
authors.lastname: Liu
authors.forename: Ya-Juan
authors.initials: YJ
authors.lastname: Xu
authors.forename: Dong-Ming
authors.initials: DM
authors.lastname: Xu
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D031104:Gymnema sylvestre / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C578168:3beta,16beta,22alpha-trihydroxyolean-12-ene; D004365:Drugs, Chinese Herbal; D012503:Saponins; D014315:Triterpenes