Four hitherto unknown polysubstituted isofiavonoids,including three isofiavans:7,4'-dihydroxy-8,2',3'-trimethoxyisofiavan(1),7,2',4'-trihydroxy-8,3'-dimethoxyisofiavan(2),and 7,2',4'-tr...Four hitherto unknown polysubstituted isofiavonoids,including three isofiavans:7,4'-dihydroxy-8,2',3'-trimethoxyisofiavan(1),7,2',4'-trihydroxy-8,3'-dimethoxyisofiavan(2),and 7,2',4'-trihydroxy-5-methoxyisofiavan(3),and one prenylated isofiavone cudraisofiavone M(4)were isolated from the ethanol extracts of Spatholobus suberectus(for 1 and 2),Flemingia macrophylla(for 3),and Cudrania cochinchinensis(for 4),respectively.Their structures were established on the basis of extensive spectroscopic analysis.Compounds 1 and 4 exhibited weak cytotoxic activity against five human cancer cell lines(HL-60,A-549,SMMC-7721,MCF-7,and SW-480).展开更多
基金supported by the"Large-scale Compound Library"project of National Development and Reform Commission of China.
文摘Four hitherto unknown polysubstituted isofiavonoids,including three isofiavans:7,4'-dihydroxy-8,2',3'-trimethoxyisofiavan(1),7,2',4'-trihydroxy-8,3'-dimethoxyisofiavan(2),and 7,2',4'-trihydroxy-5-methoxyisofiavan(3),and one prenylated isofiavone cudraisofiavone M(4)were isolated from the ethanol extracts of Spatholobus suberectus(for 1 and 2),Flemingia macrophylla(for 3),and Cudrania cochinchinensis(for 4),respectively.Their structures were established on the basis of extensive spectroscopic analysis.Compounds 1 and 4 exhibited weak cytotoxic activity against five human cancer cell lines(HL-60,A-549,SMMC-7721,MCF-7,and SW-480).
