title: [Chemical constituents from twigs of Piper hancei].
abstract: OBJECTIVE
  To investigate the chemical constituents from the twigs of Piper hancei.
  
  
  METHODS
  The chemical constituents were isolated and purified by means of chromatographic techniques including silica gel,Sephadex LH-20 and preparative RP-HPLC. Their structures were elucidated on the basis of physicochemical properties and spectral analysis.
  
  
  RESULTS
  Eight compounds were isolated and identified as 4-allylpyrocatechol(I), piperlonguminine(II), d-sesamin(Ill), beta-sitosterol (IV), pellitorine(V), piperolactam A(VI) and piperolactam D(VII), respectively.
  
  
  CONCLUSIONS
  Compound I, III, VI and VII are isolated from Piper hancei for the first time.
authors.forename: Hai-peng
authors.initials: HP
authors.lastname: Lei
authors.forename: Xian-qiang
authors.initials: XQ
authors.lastname: Chen
authors.forename: Chun-feng
authors.initials: CF
authors.lastname: Qiao
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Zhao
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004148:Dioxolanes / Q000737:chemistry / Q000302:isolation & purification; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D026121:Indole Alkaloids / Q000737:chemistry / Q000302:isolation & purification; D031701:Piper / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D010881:Piperidones
chemical_list: D004148:Dioxolanes; D004365:Drugs, Chinese Herbal; D026121:Indole Alkaloids; D012855:Sitosterols; C457227:piperolactam A; C025473:gamma-sitosterol; C498077:piperlongumine; D010881:Piperidones