title: [Studies on xanthones from herbs of Polygala telephioides].
abstract: OBJECTIVE
  To study the chemical constituents from the whole plants of Polygala telephioides.
  
  
  METHODS
  Compounds were isolated by repeated silica gel and Sephadex LH -20 column chromatography, and their structures were determined by spectral analysis and physicochemical properties.
  
  
  RESULTS
  Six xanthones were isolated from P. telephioides, and their structures were identified as 1, 3, 7-trihydroxyxanthone (1), 1, 7-dihydroxy-3-methoxyxanthone (2), 1, 3-dihydroxyxanthone (3), 1, 7-dihydroxyxanthone (4), 1-methoxy-2, 3-methylenedioxyxanthone (5) and 1, 7-dimethoxyxanthone (6).
  
  
  CONCLUSIONS
  All the compounds were obtained from this plant for the first time.
authors.affiliation: Modern Research Center for Traditional Chinese Medicine, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100083, China.
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Chang
authors.forename: Feng
authors.initials: F
authors.lastname: Niu
authors.forename: Jing
authors.initials: J
authors.lastname: Wen
authors.forename: Yong
authors.initials: Y
authors.lastname: Jiang
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Tu
mesh_terms: D010946:Plants, Medicinal / Q000737:chemistry*; D031801:Polygala / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C511009:1-methoxy-2,3-methylenedioxyxanthone; D044004:Xanthones; C436833:gentisein