title: [Chemical Constituents from Ethyl Acetate Extract of Psidium guajava Leaves (II)].
abstract: OBJECTIVE
  To study the chemical constituents from ethyl acetate extract of Psidium guajava leaves.
  
  
  METHODS
  The constituents were separated and purified by silica gel and Sephadex LH-20 column chromatography and their structures were identified on the basis of physicochemical properties and spectral data.
  
  
  RESULTS
  Eleven compounds were isolated and identified as 6,10,14-trimethyl-2-pentadecanone (1), phytyl-acetate (2), cubenol (3), eucalyptin (4), n-docosanoic acid-p-hydroxy-phenethylol ester (5),8-methyl-5,7- dihydroxy-flavonone (6), 6-methyl-5,7-dihydroxy-flavonone (7), betulinic acid (8), carnosol (9), quercetin (10), and 2,4,6-tirhydroxy- 3,5-dimethyl-diphenylketone-4-O-(6'"-O-galloyl)-β-D-glucoside (11).
  
  
  CONCLUSIONS
  Compounds 1-9 are isolated from this plant for the first time.
authors.forename: Wen
authors.initials: W
authors.lastname: Ouyang
authors.forename: Xiao-ai
authors.initials: XA
authors.lastname: Zhu
authors.forename: Cui-xia
authors.initials: CX
authors.lastname: He
authors.forename: Xue-xiang
authors.initials: XX
authors.lastname: Chen
authors.forename: Shu-min
authors.initials: SM
authors.lastname: Ye
authors.forename: Shan
authors.initials: S
authors.lastname: Peng
authors.forename: Yong
authors.initials: Y
authors.lastname: Cao
mesh_terms: D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D005960:Glucosides; D053978:Pentacyclic Triterpenes; D064209:Phytochemicals / Q000032:analysis*; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D031647:Psidium / Q000737:chemistry*; D011794:Quercetin; D014315:Triterpenes; D000094062:Betulinic Acid
chemical_list: D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D005960:Glucosides; D053978:Pentacyclic Triterpenes; D064209:Phytochemicals; D010936:Plant Extracts; D014315:Triterpenes; C442482:eucalyptin; D011794:Quercetin; D000094062:Betulinic Acid