Amaranzole A, a New N-Imidazolyl Steroid from Phorbas amaranthus

Amaranzole A, a New N-Imidazolyl Steroid from Phorbas amaranthus Amaroxocanes A and B: Sulfated Dimeric Sterols Defend the Caribbean Coral Reef Sponge <i>Phorbas amaranthus</i> from Fish Predators Phorbasterones A−D, Cytotoxic <i>Nor</i>-Ring A Steroids from the Sponge <i>Phorbas amaranthus</i> Exciton coupling circular dichroism of an allylic N‐imidazolyl group in amaranzole A, a marine natural product from Phorbas amaranthus A New Manzamine Congener from Marine Sponge Amphimedon sp. Zamamidines A and B, New Manzamine Alkaloids from the Sponge Amphimedon Species Zamamiphidin A, a New Manzamine Related Alkaloid from an Okinawan Marine Sponge Amphimedon sp. A new steroidal alkaloid from a marine sponge Corticium sp 2-amino imidazole alkaloids from the marine sponge leucetta chagosensis Ma'eganedin A, a new manzamine alkaloid from Amphimedon sponge