title: Three new steroidal glycosides from the roots of Cynanchum auriculatum.
abstract: Three new steroidal glycosides, cyanoauriculosides F, G and H (1-3), were isolated from the roots of Cynanchum auriculatum (Asclepiadaceae) along with two known steroidal derivatives. On the basis of spectroscopic analysis and chemical methods, their structures were identified as 20-O-acetyl-8,14-seco-penupogenin-8-one 3-O-α-L-cymaropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-α-L-diginopyranosyl-(1→4)-β-D-cymaropyranoside (1), 2',3'-Z-gagaminine 3-O-α-L-cymaropyranosyl-(1→4)-β-D-cymaro-pyranosyl-(1→4)-α-L-diginopyranosyl-(1→4)-β-D-cymaropyranoside (2), 17-O-acetyl-kidjoranin 3-O-α-L-cymaropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-α-L-cymaro-pyranosyl-(1→4)-β-D-digitoxopyranosyl-(1→4)-β-D-digitoxopyranoside (3), gagaminine 3-O-α-L-cymaropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-α-L-digino-pyranosyl-(1→4)-β-D-cymaropyranoside (4) and wilfoside D1N (5).
authors.affiliation: Laboratory for Natural Product Chemistry, College of Pharmacy, South Central University for Nationalities, Wuhan, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Lu
authors.forename: Hong-Li
authors.initials: HL
authors.lastname: Teng
authors.forename: Guang-Zhong
authors.initials: GZ
authors.lastname: Yang
authors.forename: Zhi-Nan
authors.initials: ZN
authors.lastname: Mei
mesh_terms: D002240:Carbohydrate Sequence; D031105:Cynanchum / Q000033:anatomy & histology / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D006027:Glycosides; D013256:Steroids