title: [Flavonoids in leaves of Alstonia scholaris].
abstract: OBJECTIVE
  To investigate the flavonoids in leaves of Alstonia scholaris, an ethno-remedy of Dai People in Yunnan.
  
  
  METHODS
  The chemical constituents were isolated and purified by column chromatography. Their structures were elucidated on the basis of spectroscopic evidences and physicochemical properties.
  
  
  RESULTS
  Eight flavonoids were isolated and identified as kaempferol (1), quercetin (2), isorhamnetin (3), kaempferol-3-0-beta-D-galactopyranoside (4), quercetin-3-0-beta-D-galactopyranoside (5), isorhamnetin-3-0-beta-D-galactopyranoside (6), kaempferol-3-0-beta-D-xylopyranosyl-( 2-1)-0-beta-D-galactopyranoside (7) ,quercetin-3-0-beta-D-xylopyranosyl-( 2-1)-0-beta-D-galactopyranoside (8).
  
  
  CONCLUSIONS
  Flavonoids 1-7 were isolated from A. scholaris for the first time.
authors.affiliation: School of Pharmacy, Yunnan College of Traditonal Chinese Medicine, Kunming 650200, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Hui
authors.forename: Yun
authors.initials: Y
authors.lastname: Sun
authors.forename: Liping
authors.initials: L
authors.lastname: Zhu
authors.forename: Wen
authors.initials: W
authors.lastname: Guo
authors.forename: Gaoxiong
authors.initials: G
authors.lastname: Rao
mesh_terms: D031051:Alstonia / Q000737:chemistry*; D005419:Flavonoids / Q000032:analysis* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D005419:Flavonoids