title: [Studies on xanthones from aerial parts of Polygala sibirica].
abstract: OBJECTIVE
  To investigate the chemical constituents of the aerial parts of Polygala sibirica systematically.
  
  
  METHODS
  The chemical constituents were isolated by various column chromatographic methods. The structures were identified by spectral data.
  
  
  RESULTS
  Ten compounds were isolated and identified as 6-hydroxy-1, 2, 3, 7-tetramethoxy xanthone (1); 1, 2, 3, 6, 7-heptamethoxy xanthone (2); 1, 7-didydroxy-2, 3-methylenedioxy xanthone (3); 1, 7-dihydroxy-2, 3-dimethoxy xanthone (4); 1, 3, 7-trihydroxy-2-methoxy xanthone (5); 1, 6, 7-trihydroxy-2, 3-dimethoxy xanthone (6); alpha-spinasterol (7); alpha-spinasterolic-3-O-beta-D-glucoside (8); squalene (9) and polygital (10).
  
  
  CONCLUSIONS
  Compounds 1-10 were isolated from this species for the first time.
authors.affiliation: State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China.
authors.forename: Yuelin
authors.initials: Y
authors.lastname: Song
authors.forename: Yong
authors.initials: Y
authors.lastname: Jiang
authors.forename: Sixiang
authors.initials: S
authors.lastname: Zhou
authors.forename: Dan
authors.initials: D
authors.lastname: Bi
authors.forename: Pengfei
authors.initials: P
authors.lastname: Tu
mesh_terms: D035261:Plant Components, Aerial / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D031801:Polygala / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D044004:Xanthones; C009689:xanthone