title: [Study on chemical constituents of petroleum ether portion from seed of Picria felterrae].
abstract: OBJECTIVE
  To study the chemical constituents of petroleum ether portion from Seed of Picria felterrae.
  
  
  METHODS
  The chemical constituents were extracted and isolated with solvent and chromatography, and the chemical structures were determined on the basis of physicochemical properties and spectral data (UV, IR, 1H-NMR, 13C-NMR, MS).
  
  
  RESULTS
  Six chemical constituents were identified as follows: chrysophanol (I), 1-hydroxy-6-methyl-anthraquinone (II), beta-sitosterol (III), betulin (IV), N-benzoyl-phenylalanyl-L-phenylalaninol acetate (V) and picfeltarraenone I (VI).
  
  
  CONCLUSIONS
  Compounds I, II and IV are isolated from this plant for the first time.
authors.affiliation: Guangxi Traditional Chinese Medical University, Nanning 530001, China. 12031983@163.com
authors.forename: Qin
authors.initials: Q
authors.lastname: Qiu
authors.forename: Fei-Fei
authors.initials: FF
authors.lastname: Cen
authors.forename: Han-Shen
authors.initials: HS
authors.lastname: Zhen
mesh_terms: D000473:Alkanes / Q000737:chemistry; D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D032266:Scrophularia / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000094062:Betulinic Acid
chemical_list: D000473:Alkanes; D000880:Anthraquinones; D014315:Triterpenes; C002503:betulin; D000094062:Betulinic Acid; C004544:naphtha