Two dimeric flavonoids from Bauhinia purpurea

摘要

Bauhinia purpurea leaves yield two new dimeric flavonoids namely bis [3',4'-dihydroxy-6-methoxy-7,8-furano-5',6'-mono-methylallyloxy ]-5-C-5-biflavonyl 1 and (4'-hydroxy-7-methyl 3-C-alpha-L-rhamnopyranosyl) -5-C-5- (4'-hydroxy-7-methyl-3-C-alpha-D-glucopyranosyl) biflavonoid 2 with protein precipitating capacity 214.4 and 199.24 mug BSA /g,respectively.Their identity has been established on basis of spectroscopic data and chemical reactions.