title: [Studies on chemical constituents from roots of Polygonum amplexicaule].
abstract: OBJECTIVE
  To investigate the chemical constituents in the roots of Polygonum amplexicaule var. sinense.
  
  
  METHODS
  The compounds were isolated by column chromatography on silica gel and Sephadex LH-20. The structures were identified by means of IR, 1H-NMR, 13C-NMR and MS analyses.
  
  
  RESULTS
  Eight compounds were isolated and identified as friedelin (1), beta-sitosterol (2), simiarenone (3), angelicin (4), psoralen (5), palmitic acid (6), (-)-epicatechin (7), and quercetin (8), respectively.
  
  
  CONCLUSIONS
  All compounds were isolated from this species for the first time and compounds 1, 3-6 were obtained from this genus for the first time.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100093, China.
authors.forename: Hengchun
authors.initials: H
authors.lastname: Ren
authors.forename: Dingrong
authors.initials: D
authors.lastname: Wan
authors.forename: Zhongmei
authors.initials: Z
authors.lastname: Zou
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D009930:Organic Chemicals / Q000032:analysis / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry*; D028502:Polygonum / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals