title: [Caffeoylquinic acid derivatives from leaves of Lonicera japonica].
abstract: OBJECTIVE
  To study the caffeoylquinic acid derivatives from the leaves of Lonicera japonica.
  
  
  METHODS
  The compounds were isolated by column chromatography and identified on the basis of physico-chemical constants and spectral analysis.
  
  
  RESULTS
  Five caffeoylquinic acid derivatives were isolated,and their structures were identified as 3,4-di-O-caffeoyl quinic acid methyl ester (1), 5-O-caffeoyl quinic acid methyl ester (2), 3,4-di-O-caffeoyl quinic acid (3), 1,3-di-O-caffeoyl quinic acid (4) and chlorogenic acid (5), respectively.
  
  
  CONCLUSIONS
  Compounds 2, 4 were obtained from this genus for the first time. Compounds 1, 3 were obtained from this plant for the first time.
authors.affiliation: Tangshan Vocational and Technical College, Tangshan 063000, China. woshimajunli@163.com
authors.forename: Junli
authors.initials: J
authors.lastname: Ma
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.forename: Xian
authors.initials: X
authors.lastname: Li
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D031239:Lonicera / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D011801:Quinic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D004365:Drugs, Chinese Herbal; C472707:caffeoylquinic acid; D011801:Quinic Acid