title: [Studies on chemical constituents of leaves of Psidium guajava].
abstract: OBJECTIVE
  To study the chemical constituents of the leaves of Psidium guajava.
  
  
  METHODS
  The chemical constituents were isolated by column chromatography on silica gel, Sephadex LH-20 and MPLC. Their structures were elucidated on the basis of spectral analysis.
  
  
  RESULTS
  Nine compounds were isolated from this plant, and the structure of them were identified as ursolic acid (1), 2alpha-hydroxyursolic acid (2), 2alpha-hydroxyoleanolic acid (3), morin-3-O-alpha-L-arabopyranoside (4), quercetin (5), hyperin (6), myricetin-3-O-beta-D-glucoside (7), quercetin-3-O-beta-D-glucuronopyranoside (8), 1-O-galloyl-beta-D-glucose (9).
  
  
  CONCLUSIONS
  Compounds 3, 7-9 were isolated from this plant for the first time.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
authors.forename: Huizheng
authors.initials: H
authors.lastname: Fu
authors.forename: Yongming
authors.initials: Y
authors.lastname: Luo
authors.forename: Dongming
authors.initials: D
authors.lastname: Zhang
mesh_terms: D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D031647:Psidium / Q000737:chemistry*
chemical_list: D010936:Plant Extracts