title: 5alpha-steroidal glycosides from Parepigynum funingense.
abstract: Four new 5alpha-steroidal glycosides with an unusual framework, funingenosides A (1), B (2), C (3), and D (4), were isolated from the roots of Parepigynum funingense. Their structures were elucidated on the basis of 1D and 2D NMR techniques. The structure and relative stereochemistry of compound 1 were demonstrated by X-ray crystallographic analysis.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Hua
authors.forename: Hai-Yang
authors.initials: HY
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Ni
authors.forename: Chang-Xiang
authors.initials: CX
authors.lastname: Chen
authors.forename: Yang
authors.initials: Y
authors.lastname: Lu
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Qi-Tai
authors.initials: QT
authors.lastname: Zheng
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D002681:China; D018360:Crystallography, X-Ray; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry; D013237:Stereoisomerism; D013256:Steroids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D013256:Steroids