title: [Studies on chemical constituents from Polygonum macrophyllum].
abstract: OBJECTIVE
  To study the chemical structures from Polygonum macrophyllum D. Don.
  
  
  METHODS
  To isolate the constituents by reverse phase chromatography and characterize their structures by the analysis of chemical property and spectral data.
  
  
  RESULTS
  Six compounds were isolated from the 70% acetone extract from the complete herb of P. macrophyllum. Their structures were elucidated as (-)-epicatechin-5-O-beta-D-glucopyranoside (I), (+)-catechin-7-O-beta-D-glucopyranoside (II), 1-(3-O-beta-D-glucopyranosyl 4,5-dihydroxy-phenyl)-ethanone (III) (-)-epicatechin (IV), chlorogenic acid (V) and gallic acid (VI).
  
  
  CONCLUSIONS
  Compounds I-VI were isolated from the plant for the first time.
authors.affiliation: Lanzhou Medical College, Lanzhou 730000.
authors.forename: Silei
authors.initials: S
authors.lastname: Wang
authors.forename: Dinghai
authors.initials: D
authors.lastname: Wang
authors.forename: Shilan
authors.initials: S
authors.lastname: Feng
mesh_terms: D002392:Catechin / Q000302:isolation & purification*; D002726:Chlorogenic Acid / Q000302:isolation & purification*; D002855:Chromatography, Thin Layer / Q000379:methods; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D005707:Gallic Acid / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D028502:Polygonum / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods
chemical_list: D004365:Drugs, Chinese Herbal; D002726:Chlorogenic Acid; D005707:Gallic Acid; D002392:Catechin