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. T
he structure of the new compound was elucidated by spectroscopic analy
sis, 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.