title: Five new pregnane glycosides from the stems of Marsdenia tenacissima.
abstract: Activity-guided fractionation of the stems of Marsdenia tenacissima led to the isolation of five new pregnane glycosides, namely marstenacissides E (1), F (2), G (3), H (4), and I (5). Their structures were determined on the basis of (1)H and (13)C NMR, COSY, TOCSY, ROESY, and FABMS experiments.
authors.affiliation: Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Zeng-Hua
authors.initials: ZH
authors.lastname: Xia
authors.forename: Shi-Long
authors.initials: SL
authors.lastname: Mao
authors.forename: Ai-Na
authors.initials: AN
authors.lastname: Lao
authors.forename: Jun
authors.initials: J
authors.lastname: Uzawa
authors.forename: Shigeo
authors.initials: S
authors.lastname: Yoshida
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Fujimoto
mesh_terms: D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D031101:Marsdenia / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018547:Plant Stems / Q000737:chemistry; D011278:Pregnanes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D011278:Pregnanes