title: [Chemical constituents of flavonoids from Apocynum venetum].
abstract: OBJECTIVE
  To study the chemical constituents of flavonoids from Apocynum venetum L.
  
  
  METHODS
  The compounds from water extracts were isolated by HPD-100 MCI-gel, polyamide, silica and Sephadex LH-20. Their structrues were characterized by chemical methods and spectroscopic methods.
  
  
  RESULTS
  The five compounds were identified to be trifolin (I), hyperroside (III), hyperin (V), isoquercetin-6'-o-acetate (VII) and isoquercetin (VIII).
  
  
  CONCLUSIONS
  Compound I and compound VII are isolated from Apocynum venetum L. for the first time.
authors.affiliation: School of Pharmaceutical Science, Shanxi Medical University, Taiyuan 031000, China.
authors.forename: Xiu-li
authors.initials: XL
authors.lastname: Cheng
authors.forename: Su-qiong
authors.initials: SQ
authors.lastname: Zhang
authors.forename: Qing-shan
authors.initials: QS
authors.lastname: Li
mesh_terms: D030010:Apocynum / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D044948:Flavonols; D011794:Quercetin