title: [Studies on the triterpenoidal saponins from flowers of Eriobotrya japonica].
abstract: OBJECTIVE
  To investigate the chemical composition of the flowers of Eriobotrya japonica.
  
  
  METHODS
  Four constituents were isolated from the ethanolic extracts of flowers of Eriobotrya japonica (Thunb) Lindl and were identified by chemical methods and spectroscopic (IR, MS, 1HNMR, 13CNMR).
  
  
  RESULTS
  The structures were identified as: Oleanolic acid (I), Ursolic acid(II), 2 alpha, 3 alpha, 19 alpha-Trihydroxyurs-5,12-dien-28-acid (III) and 2 beta, 3 beta, 23 alpha-Trihydroxyolean-12-en-28-acid (IV).
  
  
  CONCLUSIONS
  The compounds I, II, III and IV were obtained from the flowers of Eriobotrya japonica for the first time.
authors.affiliation: Department of Organic Chemistry, School of Pharmacy, WCUMS, Chengdu 610041, China.
authors.forename: L
authors.initials: L
authors.lastname: Cheng
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: L
authors.initials: L
authors.lastname: Chen
authors.forename: J
authors.initials: J
authors.lastname: Luo
mesh_terms: D031983:Eriobotrya / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000737:chemistry / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000097245:Ursolic Acid
chemical_list: D009828:Oleanolic Acid; D012503:Saponins; D014315:Triterpenes; D000097245:Ursolic Acid