title: [Study on flavonoids in leaves of Apocynum ventum].
abstract: OBJECTIVE
  To study the flavonoids in the leaves of Apocynum ventum.
  
  
  METHODS
  Compounds were separated by repeated polyacrylamide column chromatgraphy combined with Sephadex LH-20 column chromatgraphy, their structures were confirmed by the analysis of spectral data and physicochemical properties.
  
  
  RESULTS
  Six compounds were isolated from A. ventum. They were elucidated as quercetin (1), kaempferol (2), kaempferol-3-O-(6"-O-acetyl)-beta-D-glucopyranoside (3), quercetin-3-O-(6"-O-acetyl )-beta-D-glucopyranoside (4), quercetin-3-O-(6"-O-acetyl)-beta-D-galactopyranoside (5), kaempferol-7-O-alpha-L-rhamnopyranoside (6).
  
  
  CONCLUSIONS
  Compound 5 and 6 were isolated from the genus Apocynum for the first time.
authors.affiliation: Department of Analysis of Traditional Chinese Medicine, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Li
authors.forename: Zhong
authors.initials: Z
authors.lastname: Yuan
mesh_terms: D030010:Apocynum / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D005419:Flavonoids; D006027:Glycosides; D044949:Kaempferols; C516876:kaempferol-7-O-alpha-L-rhamnopyranoside; C006552:kaempferol; D011794:Quercetin