title: [Studies on the chemical constituents of Chaenomeles speciosa].
abstract: OBJECTIVE
  To study the chemical constituents of Chaenomeles speciosa.
  
  
  METHODS
  Isolation and purification were carried out by varied chromatographies, and structure identifications of compounds were carried out by physical methods, chemical methods and spectral data.
  
  
  RESULTS
  Seven compounds were obtained from the ethyl acetate fraction of C. speciosa, and were identified as cinnamic acid (I), 2'-methoxyaucuparin (II), 2-hydroxyl-butanedioic acid-4-methylester (III), esculetin (IV), p-hydroxybenzoic acid (V), chlorogenic acid (VI), caffeic acid (VII).
  
  
  CONCLUSIONS
  Compounds I - IV are obtained from Chaenomeles genus for the first time.
authors.affiliation: Jilin Agricultural University, Changchun 130118, China. yyb_gy@126.com
authors.forename: Ying-bo
authors.initials: YB
authors.lastname: Yang
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Zhi-jun
authors.initials: ZJ
authors.lastname: Wu
authors.forename: You-lan
authors.initials: YL
authors.lastname: Zheng
authors.forename: Lian-na
authors.initials: LN
authors.lastname: Sun
mesh_terms: D002726:Chlorogenic Acid / Q000737:chemistry / Q000302:isolation & purification; D002855:Chromatography, Thin Layer; D002934:Cinnamates / Q000737:chemistry / Q000302:isolation & purification*; D005638:Fruit / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010226:Parabens / Q000737:chemistry / Q000302:isolation & purification; D027824:Rosaceae / Q000737:chemistry*; D014468:Umbelliferones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D002934:Cinnamates; D010226:Parabens; D014468:Umbelliferones; C029010:cinnamic acid; D002726:Chlorogenic Acid; C007628:esculetin