title: [Studies on the chemical constituents from Conyza canadensis].
abstract: OBJECTIVE
  To study the chemical constituents of Conyza canadensis.
  
  
  METHODS
  Chromatographic methods including HP20 macroporous resin, silica gel, Sephadex LH-20 and eighteen alkyl silane bonding silica gel (ODS) were used for the isolation and purification of Conyza canadensis. The structures of the obtained compounds were identified by physical chemistry and spectroscopic data.
  
  
  RESULTS
  Six compounds were isolated from ethanol-extraction of water area of C. canadensis and identified as Eugenyl beta-Psd (1), scutellarin (2), luteolin-7-O-beta-D-glucuronide (3), quercetin (4), quercetin-3-O-beta-D-glucopyranoside (5) and luteolin (6).
  
  
  CONCLUSIONS
  Compounds 1,3,5 and 6 are isolated from C. canadensis for the first time.
authors.affiliation: Institute of Traditional Chinese Medicine & Natural Products/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, China.
authors.forename: Hong-Li
authors.initials: HL
authors.lastname: Liu
authors.forename: Bai-Lian
authors.initials: BL
authors.lastname: Liu
authors.forename: Guo-Cai
authors.initials: GC
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Dai
authors.forename: Wen-Cai
authors.initials: WC
authors.lastname: Ye
authors.forename: Yao-Lan
authors.initials: YL
authors.lastname: Li
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry; D047310:Apigenin / Q000737:chemistry / Q000302:isolation & purification; D035401:Conyza / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification; D005965:Glucuronates / Q000737:chemistry / Q000302:isolation & purification; D047311:Luteolin / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D009005:Monosaccharides / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D005960:Glucosides; D005965:Glucuronates; D009005:Monosaccharides; C456096:luteolin-7-O-glucuronide; C517440:quercetin-3'-O-beta-D-glucopyranoside; C484876:scutellarin; D000431:Ethanol; D047310:Apigenin; D011794:Quercetin; D047311:Luteolin; C110309:quercetin 3-O-glucopyranoside