title: [Studies on the chemical constituents of Portulaca oleracea].
abstract: OBJECTIVE
  To study the chemical constituents of Portulaca oleracea.
  
  
  METHODS
  The constituents were isolated by column chromatography and identified on the basis of physicochemical and spectral data.
  
  
  RESULTS
  Five compounds were isolated from 70% ethanol extract of this plant and their structures were elucidated as cyclo (Phe-Ile) (1), cycle (Tyr-Ala) (2), adenine (3), friedelin (4) and isoselachoceric acid (5).
  
  
  CONCLUSIONS
  Compounds 1-5 are isolated from Portulaca oleracea for the first time.
authors.affiliation: School of Pharmacy, Shandong University, Jinan 250012, China.
authors.forename: Ce-jia
authors.initials: CJ
authors.lastname: Liu
authors.forename: Dian-yu
authors.initials: DY
authors.lastname: Liu
authors.forename: Lan
authors.initials: L
authors.lastname: Xiang
authors.forename: Wen
authors.initials: W
authors.lastname: Zhou
authors.forename: Ning-ning
authors.initials: NN
authors.lastname: Shao
mesh_terms: D000225:Adenine / Q000737:chemistry / Q000302:isolation & purification*; D000431:Ethanol / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D031822:Portulaca / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000094042:Lupanes
chemical_list: D000225:Adenine; D000431:Ethanol; D005227:Fatty Acids; D010456:Peptides, Cyclic; D014315:Triterpenes; C060796:friedelin; D000094042:Lupanes; C010210:lignoceric acid