Terpenoid constituents of morphologically similar sponges in the family aplysillidae

The sponge Darwinella sp, contains the known compounds ambliofuran (4) and aplysulphurin (3), and the new compound tetrahydroaplysulphurin-1 (5). Daminella oxeata collected from various locations around New Zealand, contains aplysulphurin (3) and the new compounds tetrahydroaplysulphurins-1 (5), -2 (6), and -3 (7). Dendrilla rosea which is morphologically similar to the Daminella sp. above, contains the known compounds ambliofuran (4), aplyroseols-l (8), -2 (9), -3 (lo), -5 (1l), -6 (12), and -7 (15), as well as the new compounds dendrillol-1 (13), dendrillol-2 (14), dendrillol-3 (17) and dendrillol-4 (18). The structure of dendrillol-l (13) has been confirmed by a single-crystal X-ray determination.