title: [Chemical constituents of flavonoids from flowers of Koelreuteria paniculata].
abstract: OBJECTIVE
  To study the chemical constituents from flowers of Koelreuteria paniculata.
  
  
  METHODS
  Column chromatography and spectral analysis were used to isolate and identify the constituents.
  
  
  RESULTS
  The EtOAc fraction from flowers of Koelreuteria paniculata was separated and purified. Nine compounds were obtained and identified as:sitosterol glucoside (I), gallic acid (II), kaempferol (III), luteolin (IV), kaempferol-3-O-(6"-acetyl)-beta-D-glucopyranoside (V), hyperoside-2"-O-acetyl (VI), hyperoside-2"-O-galloyl (VII), hyperoside (VIII), kaempferol-3-O-D-glucopyranoside (IX).
  
  
  CONCLUSIONS
  Nine compounds are isolated for the first time from flowers of Koelreuteria paniculata. Compounds IV, V, VI and IX are isolated from this genus for the first time.
authors.affiliation: School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China. quqh@mail.xjtu.edu.cn
authors.forename: Qing-Hui
authors.initials: QH
authors.lastname: Qu
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
authors.forename: He
authors.initials: H
authors.lastname: Bao
authors.forename: Jing-Hua
authors.initials: JH
authors.lastname: Zhang
authors.forename: Xiao-Juan
authors.initials: XJ
authors.lastname: You
authors.forename: Jun-Xian
authors.initials: JX
authors.lastname: Wang
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D035264:Flowers / Q000737:chemistry*; D005707:Gallic Acid / Q000737:chemistry / Q000302:isolation & purification; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D047311:Luteolin / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D029631:Sapindaceae / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D005419:Flavonoids; D044949:Kaempferols; D012855:Sitosterols; D005707:Gallic Acid; C021304:hyperoside; D011794:Quercetin; C001579:astragalin; D047311:Luteolin