title: [Chemical constituents of ethyl acetate extract from Polygonum perfoliatum].
abstract: OBJECTIVE
  To study the chemical constituents of Polygonum perfoliatum.
  
  
  METHODS
  The chemical constituents of Polygonum perfoliatum were isolated and purified by chromatography on silica gel, Sephadex LH-20 and Semi-preparative HPLC. The structures of compounds were elucidated and identified by physicochemical properties, H-NMR, 13C-NMR and ESI-MS.
  
  
  RESULTS
  Ten compounds were isolated and identified as 5-hydroxymethyl-2-furaldEhyde (1), methyl caffeoate (2), protocatechuic aldehyde (3), quercetin (4), pinocernbrin (5), catechin (6), taxifolin (7), taxifolin-3-O-beta-D-xylopyranoside (8), 13-epitorulosal (9), coumarin-7-O-beta-D-glucose glycosidic (10).
  
  
  CONCLUSIONS
  [corrected] Compounds 6-9 are isolated from this plant for the first time.
authors.affiliation: Key Laboratory of Ministry of Education on Traditional Chinese Medicine Resource and Compound Prescription & Hubei University of Chinese Medicine, Wuhan 430065, China. chenghuanbo@163.com
authors.forename: Huan-Bo
authors.initials: HB
authors.lastname: Cheng
authors.forename: Xin-Qiao
authors.initials: XQ
authors.lastname: Liu
authors.forename: Ke-Li
authors.initials: KL
authors.lastname: Chen
mesh_terms: D000085:Acetates; D002851:Chromatography, High Pressure Liquid; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D005662:Furaldehyde / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D028502:Polygonum / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000085:Acetates; D047309:Flavones; C008046:5-hydroxymethylfurfural; C007650:ethyl acetate; D011794:Quercetin; C003377:taxifolin; D005662:Furaldehyde