Polycyclic guanidine-containing compounds from the Mediterranean sponge Crambe crambe: the structure of 13,14,15-isocrambescidin 800 and the absolute stereochemistry of the pentacyclic guanidine moieties of the crambescidins

Polycyclic guanidine-containing compounds from the Mediterranean sponge Crambe crambe: the structure of 13,14,15-isocrambescidin 800 and the absolute stereochemistry of the pentacyclic guanidine moieties of the crambescidins Polycyclic Guanidine Alkaloids from the Marine Sponge Crambe crambe and Ca⁺⁺ Channel Blocker Activity of Crambescidin 816 Polycyclic Guanidine Alkaloids from the Marine Sponge Crambe crambe and Ca⁺⁺ Channel Blocker Activity of Crambescidin 816 Additional bioactive guanidine alkaloids from the Mediterranean sponge Crambe crambe Crambescidins: new antiviral and cytotoxic compounds from the sponge Crambe crambe Two new guanidine alkaloids from the mediterranean sponge crambe crambe. Crambescidin 826 and Dehydrocrambine A:  New Polycyclic Guanidine Alkaloids from the Marine Sponge <i>Monanchora </i>sp. that Inhibit HIV-1 Fusion Crambescidin 826 and Dehydrocrambine A:  New Polycyclic Guanidine Alkaloids from the Marine Sponge Monanchora sp. that Inhibit HIV-1 Fusion Crambines C1 and C2: Two Further Ichthyotoxic Guanidine Alkaloids from the Sponge Crambe crambe Crambines C1 and C2: Two Further Ichthyotoxic Guanidine Alkaloids from the Sponge Crambe crambe