Two Mallotus species have formerly been investigated
for triterpenoids. M. philippinensis has been shown in
India to contain acetylaleuritolic acid, lupeol and betulin
3-acetates, and cc-amyrin Cl]. Our work on M. paniculatus
(Lam.) Muell.-Arg. [2] has proved that the leaves
and stems both yielded friedelin and friedelan-3fi-01, and
also an unidentified carbonyl compound, the structure
of which is reported in this paper. The present work
describes also an investigation of the neutral and acidic
triterpenoids of another Ma/lotus species, M. hookerianus
Muell.-Arg., which has not previously been examined.