title: [Studies on the chemical constituents of Gynostemma longipes C.Y. Wu].
abstract: A new triterpenoid saponin named gylongiposide I was isolated from the aerial parts of Gynostemma longipes C.Y. Wu. On the basis of chemical evidence and spectral data the structure of gylongiposide I was elucidated as 19-oxo-3 beta, 20(S), 21-trihydroxydammar-24-ene-3-O-([alpha-L-rhamnopyranosy(1-->2)] [beta-D-xylpyranosyl(1-->3)]) alpha-L-arabinopyranoside (G). The known compounds were identified as gypenoside XLIX(F) and ginsenoside Rb1(A).
authors.affiliation: School of Pharmaceutical Sciences, Beijing Medical University, Beijing 100083.
authors.forename: X L
authors.initials: XL
authors.lastname: Guo
authors.forename: T J
authors.initials: TJ
authors.lastname: Wang
authors.forename: B L
authors.initials: BL
authors.lastname: Bian
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D036145:Ginsenosides; D029774:Gynostemma / Q000737:chemistry*; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C517623:3-((O-6-deoxymannopyranosyl-1-2-O-(xylopyranosyl-1-3)arabinopyranosyl)oxy)-21-glucopyranosyloxy-20-hydroxydammar-24-en-19-al; D004365:Drugs, Chinese Herbal; D036145:Ginsenosides; D012503:Saponins; D014315:Triterpenes; C442845:gylongiposide I