title: [Study on three aristololatams from Piper wallichii].
abstract: OBJECTIVE
  To study the chemical constituents from Piper wallichii.
  
  
  METHODS
  Three aristololatams were isolated and purified by chromatography with silica gel column and Sephadex LH-20 gel column, and the structures of the compounds were identified by spectral analysis.
  
  
  RESULTS
  Three aristololatams were identified as cepharanone B, aristolactam A II and aristololatam A III a.
  
  
  CONCLUSIONS
  Three aristololatams were isolated from Piper wallichii for the first time.
authors.affiliation: College of Pharmacy, Tongji Medical Center, Huazhong University of Science and Technology, Wuhan.
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhao
authors.forename: Jinlan
authors.initials: J
authors.lastname: Ruan
authors.forename: Yaling
authors.initials: Y
authors.lastname: Cai
mesh_terms: D034341:Aristolochic Acids / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D031701:Piper / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011208:Powders
chemical_list: D034341:Aristolochic Acids; D011208:Powders; C064674:aristololactam BII