title: Two new steroidal glycosides from Cynanchum otophyllum Schneid.
abstract: Two new C21 steroidal glycosides were isolated from Cynanchum otophyllum Schneid. Their structures were elucidated as qinyangshengenin-3-O-β-d-digitoxopyranoside (1) and rostratamine-3-O-β-d-cymaropyranosyl-(1 → 4)-β-d-digitoxopyranoside (2) on the basis of chemical and spectroscopic methods, including 1D and 2D NMR experiments.
authors.affiliation: a College of Pharmacy, Liaoning University of Traditional Chinese Medicine , Dalian 116600 , China.
authors.forename: Xin-Xin
authors.initials: XX
authors.lastname: Yang
authors.forename: Yong-Rui
authors.initials: YR
authors.lastname: Bao
authors.forename: Li-Fen
authors.initials: LF
authors.lastname: Wang
authors.forename: Shuai
authors.initials: S
authors.lastname: Wang
authors.forename: Li-Na
authors.initials: LN
authors.lastname: Bao
authors.forename: Yu-Peng
authors.initials: YP
authors.lastname: Guan
authors.forename: Xian-Sheng
authors.initials: XS
authors.lastname: Meng
mesh_terms: D031105:Cynanchum / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry; D011278:Pregnanes; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D011278:Pregnanes; D013256:Steroids; C000598457:qinyangshengenin-3-O-beta-D-digitoxopyranoside; C000598458:rostratamine-3-O-beta-D-cymaropyranosyl-(1-4)-beta-D-digitoxopyranoside
keywords: 2,6-dideoxypyranose; Asclepiadaceae; C21 steroidal glycosides; Cynanchum otophyllum