title: [Chemical constituents in herb of Polygonum orientale II].
abstract: OBJECTIVE
  To study the chemical constituents of the essential substance from the 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
  Seven compounds were obtained and identified as ombuine-3-O-beta-D-galactopyranoside (1), ombuine-3-O-rutinoside (2), tryptophan (3), quercetin-3-O-methyl ether (4), kaempferol-3-O-(2"-O-alpha-L-rhamnopyranosyl) -beta-D-glucuronopyranoside (5), quercetin-3-O-(2"-O-alpha-L-rhamnopyranosyl)-beta-D-glucuronopyranoside (6), quercetin-3-O-beta-D-glucuronide (7).
  
  
  CONCLUSIONS
  Compounds 4-7 were isolated from P. oriental for the first time and compounds 1-3 were firstly obtained from the genus Polygonum. The total 1H and 13C-NMR date of compound 1 were assigned for first time.
authors: School of Pharmacy, Guiyang Medical College, Guiyang 550004, China. liyongjun026@126.com
authors: Yongjun
authors: Y
authors: Li
authors: Cuibing
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authors: Yonglin
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