title: [Sterols of marine bryozoan Bugula neritina from the South China Sea].
abstract: OBJECTIVE
  To study the sterol constituents of Bugula neritina from the South China Sea.
  
  
  METHODS
  The alcohol extract of Bugula neritina was purified by silica gel column and Sephadex LH-20 column chromatography, and structures of the isolated compounds were identified by spectroscopic analysis and comparison with those of literatures.
  
  
  RESULTS
  Ten sterols were isolated and identified from the petroleum ether fraction of alcohol extract of B. neritina L.:Cholest-4-en-3-one(I); cholesterol(II);3beta,5alpha,9alpha-trihydroxy-(22E,24R)-ergosta-7,22-dien-6-one(III); 24-methyl-5alpha-cholesta-7,22-diene-3beta,5,6beta-triol(IV); 3beta-Hydroxy-7-methoxy-Cholesta-5-en(V);5alpha, 8alpha-epidioxy-(22E,24R)-ergosta-6, 22-dien-3beta-ol(VI); 3beta-hydroxycholest-5-en-7-one (VII); and 6beta-hydroxy-cholest-4-en-3-one(VIII); Cholesta-5-ene-3beta,7beta-diol(IX); Cholesta-5,22(E)-dien-3beta,7alpha-diol(X).
  
  
  CONCLUSIONS
  Compounds IV-X were isolated from Bugula neritina for the first time.
authors.affiliation: Faculty of Life Science of Biotechnology, Kunming University of Science and Technology, Kunming 650224, China. Leihui-2008@163.com
authors.forename: Hui
authors.initials: H
authors.lastname: Lei
authors.forename: Xue-feng
authors.initials: XF
authors.lastname: Zhou
authors.forename: Ya-ling
authors.initials: YL
authors.lastname: Yang
authors.forename: Jian-fan
authors.initials: JF
authors.lastname: Sun
authors.forename: Jing
authors.initials: J
authors.lastname: Hu
authors.forename: Yong-hong
authors.initials: YH
authors.lastname: Liu
mesh_terms: D000818:Animals; D002013:Bryozoa / Q000737:chemistry*; D002681:China; D002783:Cholestenones / Q000737:chemistry / Q000302:isolation & purification; D002855:Chromatography, Thin Layer; D008419:Materia Medica / Q000737:chemistry*; D015394:Molecular Structure; D009792:Oceans and Seas; D013261:Sterols / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C419732:7-oxopetrosterol; D002783:Cholestenones; D008419:Materia Medica; D013261:Sterols; C000475:cholest-4-en-3-one