title: A new C21 steroidal glycoside from Cynanchum inamoenum (Maxim.) Loes.
abstract: A new C21 steroidal glycoside, 5beta,6beta-epoxy-glaucogenin C-3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-d-glucopyranosyl-(1 --> 4)-beta-D-cymaropyranosyl-(1 --> 4)-beta-D-oleandropyranosyl-(1 --> 4)-beta-D-oleandropyranoside, named inamoside D (1), was isolated from the MeOH extract of the roots of Cynanchum inamoenum (Maxim.) Loes (Asclepiadaceae). In addition, five known compounds, including 7-demethoxytylophorine (2), dehydrodiconiferyl alcohol gamma'-O-beta-D-glucopyranoside (3), beta-d-fructofuranosyl-(2 --> 1)-alpha-D-(6-O-sinapoyl)-glucopyranoside (4), neohancoside C (5), and cuchiloside (6), have also been isolated. The structure of 1 was determined by 1D- and 2D-NMR spectroscopies. All the compounds were isolated from this plant for the first time.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Kunming, China.
authors.forename: Li-Qin
authors.initials: LQ
authors.lastname: Wang
authors.forename: Yue-Mao
authors.initials: YM
authors.lastname: Shen
authors.forename: Jiang-Miao
authors.initials: JM
authors.lastname: Hu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
mesh_terms: D031105:Cynanchum / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D015394:Molecular Structure; D013256:Steroids / Q000737:chemistry*
chemical_list: D006027:Glycosides; D013256:Steroids