Flavonoids from the pods of Millettia erythrocalyx

From the pods of Millettia erythrocalyx, 2'-hydroxy-3,4-dimethoxy-2',3':4',3']-furanochalcone, 2',3-dihydroxy-4-methoxy-4'-gamma,gamma-dimethylallyloxychalcone, (-)-(2S)-6,3',4'-trimethoxy-2',3':7,8]-furanoflavanone, 3',4'-methylenedioxy-2',3':7,8]-furanoflavonol and 6,3'-dimethoxy-2',3':7,8]-furanoflavone were isolated, along with six other known flavonoids. Their structures were elucidated through analysis of their spectroscopic data.