Two new flavones from Fordia cauliflora of Yunnan
Liang, Z.-Y.; Yang, X.-S.; Zhu, H.-Y.; Hao, X.-J.
Yao Xue Xue Bao 41(6): 533-536
2006
ISSN/ISBN: 0513-4870 PMID: 16927828 Document Number: 597844
To study the chemical constituents of the stem of Fordia cauliflora of Yunnan province. The constituents were separated and purified by repeated silica column chromatography. The structures were elucidated by physical-chemical properties and spectroscopic data. 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). Compounds 1 and 2 are new compounds. Compounds 3 -5 were isolated from the plant for the first time.