title: [Chemical study on ethyl acetate portion of Ehretia thyrsiflora, boraginaceae species of Kudingcha].
abstract: OBJECTIVE
  To investigate the chemical constituents of Ehretia thyrsiflora.
  
  
  METHODS
  Compounds were isolated by using silica gel, Sephadex LH-20 and RP-C18 chromatography; their structures were elucidated by means of spectral data analysis.
  
  
  RESULTS
  Seven compounds were isolated and identified as methyl rosmarinate (1), caffeic acid (2), quercetin (3), kampferol (4), kaempferol 3-O-alpha-D-arabinoside (5), quercetin 3-O-alpha-D-arabinoside (6), and p-hydroxy benzoic acid (7).
  
  
  CONCLUSIONS
  All these compounds were isolated from E. thyrsiflora for the first time. Compounds 2-7 were isolated from genus Ehretia for the first time.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100094, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Li-jia
authors.initials: LJ
authors.lastname: Xu
authors.forename: Zhen-dan
authors.initials: ZD
authors.lastname: He
authors.forename: Qin-qiong
authors.initials: QQ
authors.lastname: Yang
authors.forename: Yong
authors.initials: Y
authors.lastname: Peng
authors.forename: Pei-gen
authors.initials: PG
authors.lastname: Xiao
mesh_terms: D000085:Acetates / Q000032:analysis*; D028082:Boraginaceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*
chemical_list: D000085:Acetates; D004365:Drugs, Chinese Herbal; C007650:ethyl acetate