title: [A new xanthone from Polygala aureocauda Dunn].
abstract: OBJECTIVE
  To study the chemical constituents of Polygala aureocauda Dunn..
  
  
  METHODS
  Chemical compounds were isolated by column chromatography and their structures were determined mainly by spectroscopic means (UV, IR, MS, 1HNMR, 13CNMR, HMQC, HMBC).
  
  
  RESULTS
  Three compounds were isolated and identified as 3-hydroxy-1,4-dimethoxyxanthone (I), 1, 7-dihydroxy-2, 3-methylendioxyxanthone (II), 7-hydroxy-1-methoxy-2, 3-methylendioxyxanthone (III).
  
  
  CONCLUSIONS
  Compounds I-III were isolated from Polygala aureocauda Dunn. for the first time, whereas compound I is a new xanthone.
authors.affiliation: Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Central South University, Changsha 410013, China.
authors.forename: Zhao-hui
authors.initials: ZH
authors.lastname: Huang
authors.forename: Kang-ping
authors.initials: KP
authors.lastname: Xu
authors.forename: Ying-jun
authors.initials: YJ
authors.lastname: Zhou
authors.forename: Gao-yun
authors.initials: GY
authors.lastname: Hu
authors.forename: Gui-shan
authors.initials: GS
authors.lastname: Tan
mesh_terms: D008968:Molecular Conformation; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D031801:Polygala / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C498703:3-hydroxy-1,4-dimethoxyxanthone; D044004:Xanthones