title: [Study on chemical constituents from active fraction of Cynanchum versicolor].
abstract: OBJECTIVE
  To investigate the chemical constituents of active fraction of Cynanchum versicolor.
  
  
  METHODS
  The ethanol extract of Cynanchum versicolor was purified by macroporous resin, 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
  Six compounds were isolated and identified as glaucogenin C (I), 24-methyl-5α-cholesta-7,22-diene-3β,5,6β-triol (II), syringic acid (III), 3,4-dihydroxyacetophenone (IV), 4-hydroxyacetophenone (V), and 4-hyroxy-3-methoxyacetophenone (VI).
  
  
  CONCLUSIONS
  Compounds I, II and IV are isolated from this plant for the first time.
authors.forename: Hui
authors.initials: H
authors.lastname: Lei
authors.forename: Yong-bing
authors.initials: YB
authors.lastname: Wang
authors.forename: Gong-sheng
authors.initials: GS
authors.lastname: Xiao
authors.forename: Wei-ying
authors.initials: WY
authors.lastname: Zong
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
mesh_terms: D000098:Acetophenones / Q000737:chemistry / Q000302:isolation & purification; D031105:Cynanchum / Q000737:chemistry*; D005707:Gallic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D064209:Phytochemicals / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D000098:Acetophenones; D064209:Phytochemicals; D005707:Gallic Acid; C001945:syringic acid