Two pentacyclic triterpenes, D-friedomadeir-14-en-3beta-yl acetate and D:C-friedomadeir-7-en-3beta-yl acetate, named madeiranyl acetate and isomadeiranyl acetate, respectively, were isolated from leaves of Euphorbia stygiana, together with the two known madeiranes, D-friedomadeir-14-en-3-one and