title: [Two new flavones from Fordia cauliflora of Yunnan].
abstract: OBJECTIVE
  To study the chemical constituents of the stem of Fordia cauliflora of Yunnan province.
  
  
  METHODS
  The constituents were separated and purified by repeated silica column chromatography. The structures were elucidated by physical-chemical properties and spectroscopic data.
  
  
  RESULTS
  Six compounds were isolated from the ethanol extract of the stem of Fordia cauliflora. They were identified as: 6-hydroxy-3-methoxy-6",6"-dimethylchromeno-(2", 3" : 7, 8)-flavone (1), 3-methoxy-6-(3-methyl-but-2-enyloxy)-6", 6"-dimethylchromeno-( 2", 3" : 7, 8)-flavone (2), 3, 6-dimethoxy-6", 6"-dimethylchromeno-( 2", 3" : 7, 8)-flavone (3), 7-hydroxy-4'-methoxyisoflavone (4), 7, 4'-dihydroxyisoflavone (5) and karanjin (6).
  
  
  CONCLUSIONS
  Compounds 1 and 2 are new compounds. Compounds 3 -5 were isolated from the plant for the first time.
authors.affiliation: Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, China.
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Liang
authors.forename: Xiao-Sheng
authors.initials: XS
authors.lastname: Yang
authors.forename: Hai-Yan
authors.initials: HY
authors.lastname: Zhu
authors.forename: Xiao-Jiang
authors.initials: XJ
authors.lastname: Hao
mesh_terms: D007887:Fabaceae / Q000737:chemistry*; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: C525384:3,6-dimethoxy-6'',6''-dimethylchromeno(2'',3''-7,8)flavone; C525383:3-methoxy-6-(3-methylbut-2-enyloxy)-6'',6''-dimethylchromeno(2'',3''-7,8)flavone; C525382:6-hydroxy-3-methoxy-6'',6''-dimethylchromeno(2'',3''-7,8)flavone; D047309:Flavones