title: [Chemical Composition of n-Butanol Fraction from Polygonum amplexicaule var. sinense].
abstract: OBJECTIVE
  To study chemical composition of n-butanol fraction from Polygonoum amplexicaule var. sinense.
  
  
  METHODS
  TLC,normal-phase silica gel, reveres-phase silica gel, Sephadex-LH and semi-preparative HPLC were used to isolate chemical compositions of n-butanol fraction from Polygonoum amplexicaule var. sinense.
  
  
  RESULTS
  Nine compounds were identified as: caffeic acid n-butly ester (1), p-methoxy benzoic acid propyl ester (2),p-E-coumarin quinic acid methyl ester (3),p-Z-coumarin quinic acid methyl ester (4), ethyl ferulate (5), cinchonain I a (6), cinchonain Ib (7), methyl chlorogenate(8), and 6-O-β-D-caffeoylglucose (9).
  
  
  CONCLUSIONS
  All compounds are isolated from this genus for the first time.
authors.forename: Mei-xian
authors.initials: MX
authors.lastname: Xiang
authors.forename: Ya-jing
authors.initials: YJ
authors.lastname: Hu
authors.forename: Feng
authors.initials: F
authors.lastname: He
authors.forename: Xin-qiao
authors.initials: XQ
authors.lastname: Liu
mesh_terms: D020001:1-Butanol; D002851:Chromatography, High Pressure Liquid; D064209:Phytochemicals / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D028502:Polygonum / Q000737:chemistry*
chemical_list: D064209:Phytochemicals; D010936:Plant Extracts; D020001:1-Butanol