title: New pregnane steroids from Turraea pubescens.
abstract: Three new pregnane steroids, 2beta,3beta,5beta-trihydroxy-pregn-20-en-6-one (1), 3beta-hydroxy-5alpha-pregn-7,20-dien-6-one (2), and 3beta-acetoxy-5alpha-pregn-7,20-dien-6-one (3) were isolated from the twigs and leaves of Turraea pubescens, and were structurally elucidated on the basis of spectroscopic data and chemical method.
authors.affiliation: State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Zhangjiang Hi-Tech Park, PR China.
authors.forename: Xiao-Ning
authors.initials: XN
authors.lastname: Wang
authors.forename: Cheng-Qi
authors.initials: CQ
authors.lastname: Fan
authors.forename: Jian-Min
authors.initials: JM
authors.lastname: Yue
mesh_terms: D029582:Meliaceae / Q000737:chemistry*; D008954:Models, Biological; D008968:Molecular Conformation; D015394:Molecular Structure; D035261:Plant Components, Aerial / Q000737:chemistry; D011278:Pregnanes / Q000737:chemistry* / Q000302:isolation & purification*; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D011278:Pregnanes; D013256:Steroids