title: Steroidal glycosides from Cynanchum amplexicaule.
abstract: Two new C(21) steroidal glycosides with a new aglycone of amplexicogenin B were isolated from Cynanchum amplexicaule Sieb. et Zucc. Their structures were elucidated as amplexicogenin B-3-O-β-D-cymaropyranoside (1), amplexicogenin B-3-O-β-D-cymaropyranosyl-(1 → 4)-α-L-cymaropyranosyl-(1 → 4)-β-D-cymaropyranoside (2) by means of spectral and chemical analysis.
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Huan
authors.initials: H
authors.lastname: Chen
authors.forename: Wen
authors.initials: W
authors.lastname: Li
authors.forename: Yue-Hu
authors.initials: YH
authors.lastname: Pei
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D031105:Cynanchum / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D012503:Saponins; D013256:Steroids; C561160:amplexicogenin B-3-O-beta-D-cymaropyranoside; C561161:amplexicogenin--3-O-beta-D-cymaropyranosyl-(1-4)-alpha-L-cymaropyranosyl-(1-4)-beta-D-cymaropyranoside