Isolation and structure of macarangonol, a diterpene ketol from Macaranga tanarius

Abstract The light petroleum extract of the stems of Macaranga tanarius (Euphorbiaceae) yielded in addition to several other terpenoids a new diterpene ketol, macarangonol, to which we assign structure I. A new diterpene ketol, macarangonol, has been isolated from the light petroleum extracts of Macaranga tanarius Muell.-Arg. (Euphorbiaceae).