Marine sterols with a new pattern of side-chain alkylation from the sponge Aplysina(=Verongia)Aerophoba
Abstract
The principal sterols of the marine sponge Aplysina(=Verongia)aerophoba, aplysterol and 24,28-didehydroaplysterol are characterized as 26-methyl homologues of 24-methyl- and 24-methylene-cholesterol, respectively.