title: Further constituents from the bark of Holarrhena pubescens.
abstract: Three compounds, pubadysone [11 alpha-hydroxy-18,20-oxido-3-oxo-pregna-1,4,17(20)-triene] (1), puboestrene [3-acetoxy-17-oxo-1,3,5(10)-estratriene] (2) and pubamide [3,18-dioxo-11 alpha-hydroxycona-1,4-diene] (3), have been isolated from the bark of Holarrhena pubescens. Their structures have been established through spectroscopic studies.
authors.affiliation: H.E.J. Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, Karachi 75270, Pakistan. bina@khi.comsats.net.pk
authors.forename: B S
authors.initials: BS
authors.lastname: Siddiqui
authors.forename: S B
authors.initials: SB
authors.lastname: Usmani
authors.forename: S T
authors.initials: ST
authors.lastname: Ali
authors.forename: S
authors.initials: S
authors.lastname: Begum
authors.forename: G H
authors.initials: GH
authors.lastname: Rizwani
mesh_terms: D029062:Apocynaceae / Q000737:chemistry*; D004963:Estrenes / Q000737:chemistry* / Q000302:isolation & purification; D010840:Phytosterols / Q000737:chemistry* / Q000302:isolation & purification; D024301:Plant Bark / Q000737:chemistry*; D011278:Pregnanes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D004963:Estrenes; D010840:Phytosterols; D011278:Pregnanes; C447006:pubadysone; C447008:pubamide; C447007:puboestrene