title: [Determination of flavonoids in Ginkgo biloba L. leaves from different producing areas].
abstract: OBJECTIVE
  To compare the contents of flavonoids in the leaves of Ginkgo biloba gathered from 35 producing areas.
  
  
  METHODS
  Separating and determining 3 flavonoid aglycones, quercetin, kaempferol and isorhamnetin, by high performance liquid chromatography, and there by calculating the total contents of flavonoids.
  
  
  RESULTS
  The contents of flavonoids in the leaves of G. biloba gathered from different producing areas are different, but in those gathered from Pizhou, Zheng'an Xing'an, Anlu, etc. appear higher.
authors.affiliation: School of Pharmaceutical Sciences, Beijing Medical University, Beijing 100083, China.
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: G B
authors.initials: GB
authors.lastname: Zhao
authors.forename: S Q
authors.initials: SQ
authors.lastname: Liu
authors.forename: J H
authors.initials: JH
authors.lastname: Zheng
mesh_terms: D005419:Flavonoids / Q000032:analysis*; D044948:Flavonols; D020441:Ginkgo biloba / Q000737:chemistry*; D044949:Kaempferols; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives / Q000032:analysis
chemical_list: D005419:Flavonoids; D044948:Flavonols; D044949:Kaempferols; C047368:3-methylquercetin; C006552:kaempferol; D011794:Quercetin