title: Marsdenosides A-H, polyoxypregnane glycosides from Marsdenia tenacissima.
abstract: Eight polyoxypregnane glycosides, marsdenosides A-H, were isolated from the CHCl(3)-soluble fraction of the ethanolic extract of the stem of Marsdenia tenacissima, along with six known glycosides and two known polyoxypregnane aglycones. Three polyoxypregnanes, 12beta-O-2-methylbutyryl-tenacigenin A, 11alpha,12beta-di-O-acetyltenacigenin B, and 11alpha-O-tigloyltenacigenin B were also obtained. Their structures were established on the basis of spectroscopic analysis and chemical evidence.
authors.affiliation: Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 200032, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Deng
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Liao
authors.forename: Daofeng
authors.initials: D
authors.lastname: Chen
mesh_terms: D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D031101:Marsdenia / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry
chemical_list: D006027:Glycosides