Two new rings B,D-secolimonoids, named khayalactol and 1-O-acetylkhayanolid
e B, were isolated together with three known rings B,D-secolimonoids, methy
l angolensate and its 6-hydroxy and 6-acetoxy derivatives, from the ether e
xtract of the stem bark of a meliaceous plant Khaya senegalensis. The struc
ture of these new compounds was elucidated by spectrospcopic means. The ant
ifeedant property of the isolated compounds is also described.