The seeds of Calopogonium mucunoides furnished 7-O-γ,γ-dimethylallyl-5-methoxy-3',4'-dioxymethyleneisoflavone, 7-O-γ,γ-dimethylallyl-3'-hydroxy-4'-methoxyisoflavone, 7-O-γ,γ-dimethylallyl-3',4'-dimethoxyisoflavone and 2S-di[6'',6''-dimethylpyrano(2'',3'':7,8; 2'',3'':4',3')]-flavanone whose structures were established by spectroscopic means involving the use of 400 MHz ¹H NMR with double irradiation and INDOR techniques.