title: [Chemical constituents of flowers from Polygonum orientale].
abstract: OBJECTIVE
  To study the chemical constituents in the active portion from the flowers of Polygonum oriental.
  
  
  METHODS
  Chromatographic techniques were employed for isolation and purification of the constituents and their structures were determined by spectral analysis and chemical evidence.
  
  
  RESULTS
  Nine compounds were obtained and identified as alphitonin (1), methyl 3, 4-dihydroxybenzoate (2), apocynin (3), kaempferol-3-O-beta-D-glucoside (4), 1,3,5-trihydroxybenzene (5), 3,3'-dimethoxyellagic-acid-4-O-beta-D-glucoside (6), kaempferol-3-O-alpha-L-rhamnoside (7), quercetin-3-O-alpha-L-rhamnoside (8), kaempferol (9).
  
  
  CONCLUSIONS
  Compounds 2, 4, 5 were isolated from P. oriental for the first time and compounds 1, 3 were firstly obtained from the genus Polygonum.
authors.affiliation: School of Pharmacy, Guiyang Medical College, Guiyang, China. liyongjun026@126.com
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Li
authors.forename: Xun
authors.initials: X
authors.lastname: He
authors.forename: Zhibao
authors.initials: Z
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Huang
authors.forename: Yanyu
authors.initials: Y
authors.lastname: Lan
authors.forename: Aimin
authors.initials: A
authors.lastname: Wang
authors.forename: Yonglin
authors.initials: Y
authors.lastname: Wang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000032:analysis*; D035264:Flowers / Q000737:chemistry; D028502:Polygonum / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal