A new furanoflavone, named sanaganone, was isolated from the root bark of Millettia sanagana in addition to four known compounds, pongamol, lanceolatin B, kanjone and 5-methoxy furano [7,8:4 '',5 ''] flavone. The structure of the new compound was elucidated by spectroscopic analysis, including 2D NMR techniques (DQF COSY, HETCOR, long-range HETCOR and NOESY), as 2''',2'''-dimethylpyrano [5,6:5''',6'''] furano [7,8:4 '',5 ''] flavone.