title: [Studies on the chemical constituents of Xanthoceras sorbifolia].
abstract: OBJECTIVE
  To study the chemical constituents of Xanthoceras sorbifolia for explaining the active compounds.
  
  
  METHODS
  The constituents were isolated by silica gel column chromatography. Sephadex LH-20, MCI et al and the LC-MS-MS, 1H-NMR, 13C-NMR, CD spectroscopic analysis were employed for the structure identification.
  
  
  RESULTS
  9 compounds were obtained and their structures were identified as (2R, 3R)-dihydromyricetin (I), myricetin (II), quercetin (III), (2R, 3S)-catechin (IV), gallocatechin (V), (2R, 3R)-3,3',5,5',7-pentahydroxyflavanone (VI), (2S) -3',4',5,5',7-pentahydroxyflavanone (VII), (-) epigallocatechin (VIII) , proanthocyanidin A2 (IX).
  
  
  CONCLUSIONS
  Compound I, IV, VI, VII are isolated from xanthoceras genus for the first time.
authors.affiliation: The Fourth People's Hospital of Zhen jiang, Zhenjiang 212000, China. jszhp20@163.com
authors.forename: Hui-Yan
authors.initials: HY
authors.lastname: Ni
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Zhang
mesh_terms: D002392:Catechin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification; D029631:Sapindaceae / Q000737:chemistry*
chemical_list: D047309:Flavones; D005419:Flavonoids; C040015:myricetin; D002392:Catechin; D011794:Quercetin; C057580:gallocatechol