title: [Isolation and structure identification of chemical constituents from Polygala hongkongensis II].
abstract: OBJECTIVE
  To isolate and elucidate the constituents of herbs of Polygala hongkongensis.
  
  
  METHODS
  The constituents were isolated and purify by chromatographic on silica gel, Sephadax LH-20 and semi-preparative HPLC. The structures were determined by NMR and MS spectral analysis.
  
  
  RESULTS
  Six compounds were identified as euxanthone (1), 1, 3, 6-trihydroxyxanthone (2), 1, 4, 7-trihydroxy-3-methoxy-xanthone (3), p-hydroxybenzoic acid (4), 3, 4-dihydroxybenzoic acid (5), and methy 1 2, 5-dihydroxybenzoate (6).
  
  
  CONCLUSIONS
  The known compounds 1-6 were isolated from this plant for the first time.
authors.affiliation: Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Wu
authors.forename: Si-Bao
authors.initials: SB
authors.lastname: Chen
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wu
authors.forename: Shi-Lin
authors.initials: SL
authors.lastname: Chen
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Tu
mesh_terms: D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D062385:Hydroxybenzoates / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010226:Parabens / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D031801:Polygala / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D062385:Hydroxybenzoates; D010226:Parabens; D044004:Xanthones; C009091:protocatechuic acid; C404221:euxanthone; C038193:4-hydroxybenzoic acid