title: [Study on chemical composition of ethylacetate fraction from Polygonum amplexicaule var. sinense].
abstract: OBJECTIVE
  To study chemical composition of ethylacetate fraction from Polygonoum amplexicaule D. Don var. sinense Forb.
  
  
  METHODS
  TLC, Normal-phase silica gel column, reveres-phase silica gel column, Sephadex-LH, semi-preparative HPLC column were used to isolate chemical compositions of ethylacetate fraction from Polygonoum var. sinense.
  
  
  RESULTS
  Eight compounds were identified as: 1. P-Hydroxybenzoic acid, 2. P-Hydroxybenzoic ethanol, 3. Diisobutyl phthalate, 4. Vanillin, 5. Isovanillic acid, 6.3,4,5-trihydroxy-benzoic acid-butyl ester, 7. 4-hydroxy-3-methoxycinnamic acid, 8. 7-hydroxy-6-methoxycoumarin.
  
  
  CONCLUSIONS
  Except of Diisobutyl phthalate, the others are isolated for the first from this plant, moreover, Vanillin, Isovanillic acid and P-hydro -xyphenethyl alcohol are gained from genus for the first time.
authors.affiliation: College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, China. xiangmeixian99@163.com
authors.forename: Mei-Xian
authors.initials: MX
authors.lastname: Xiang
authors.forename: Ya-Jing
authors.initials: YJ
authors.lastname: Hu
authors.forename: Yun-Jun
authors.initials: YJ
authors.lastname: Yan
mesh_terms: D000085:Acetates; D001547:Benzaldehydes / Q000737:chemistry* / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D003993:Dibutyl Phthalate / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D010626:Phenylethyl Alcohol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D028502:Polygonum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D014641:Vanillic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000085:Acetates; D001547:Benzaldehydes; C011867:4-hydroxyphenylethanol; D003993:Dibutyl Phthalate; C045317:isovanillic acid; C007650:ethyl acetate; C100058:vanillin; D014641:Vanillic Acid; C025605:diisobutyl phthalate; D010626:Phenylethyl Alcohol