title: [Separation and identification of two benzotropolones from teapigment].
abstract: OBJECTIVE
  To study the chemical constituents of teapigment.
  
  
  METHODS
  Some constituents were isolated by chromatographic methods and identified by chemical constituents and their structures were elucidated by spectral data.
  
  
  RESULTS
  From teapigment, two compounds have been isolated and identified as purpurogallin (I) and purpurogallin carboxylic acid (II).
  
  
  CONCLUSIONS
  These compounds were main pigments obtained from teapigment for the first time, and likely to be active compounds of teapigment.
authors.affiliation: Jiangxi College of Traditional Chinese medicine, Nanchang 330006.
authors.forename: Yongming
authors.initials: Y
authors.lastname: Luo
authors.forename: Yiguang
authors.initials: Y
authors.lastname: Li
authors.forename: Yihui
authors.initials: Y
authors.lastname: Xie
mesh_terms: D001567:Benzocycloheptenes / Q000032:analysis / Q000302:isolation & purification*; D015394:Molecular Structure; D010860:Pigments, Biological / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013662:Tea / Q000737:chemistry*
chemical_list: D001567:Benzocycloheptenes; D010860:Pigments, Biological; D010936:Plant Extracts; D013662:Tea; C026133:purpurogallin