The hexane extract of the bark of Entandrophragma delevoyi yielded the
known compounds azadirone, 14 beta, 15 beta-epoxyazadirone, 6 alpha-a
cetoxyazadirone, 6 alpha-acetoxy-14 beta,15 beta-epoxyazadirone, 6 alp
ha-acetoxy-14 beta,15 beta-epoxyazadiradione, 3,4-secotirucalla-4(28),
7,24-triene-3,21 acid and two novel compounds, delevoyin A (3,4-secoti
rucalla-4(28),7,24-trien-3-oic acid and delevoyin B (6 alpha-acetoxy-k
ihadalactone).