title: [Studies on the triterpenes from loquat leaf (Eriobotrya japonica)].
abstract: OBJECTIVE
  To investigate the chemical constituents from Loquat leaf (Eriobotrya japonica).
  
  
  METHODS
  Compounds were isolated by a combination of silica gel and ODS column chromatographies and preparative TLC and HPLC, their structures were identified by chemical and spectral methods.
  
  
  RESULTS
  Nine triterpenes were isolated and identified as methyl betuliate (I), oleanolic acid (II), ursolic acid (III), methyl maslinate (IV), methyl corosolate, (methyl 2alpha-3alpha-dihydroxyurs-12-en-28-oate, V), maslinic acid (VI), corosolic acid (VII), tormentic acid (VIII), euscaphic acid (IX) from loquat leaf.
  
  
  CONCLUSIONS
  Compounds I and V are obtained from this plant and Eriobotrya genus for the first time.
authors.affiliation: Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing 210014, China.
authors.forename: Han
authors.initials: H
authors.lastname: Lv
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.forename: Wei-Lin
authors.initials: WL
authors.lastname: Li
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Zhang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D027824:Rosaceae / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*; D000097245:Ursolic Acid
chemical_list: D009828:Oleanolic Acid; D014315:Triterpenes; D000097245:Ursolic Acid; C077960:methyl maslinate; C113861:corosolic acid; C412811:maslinic acid