Phorbasterones A−D, Cytotoxic Nor-Ring A Steroids from the Sponge Phorbas amaranthus

Phorbasterones A−D, Cytotoxic <i>Nor</i>-Ring A Steroids from the Sponge <i>Phorbas amaranthus</i> Phorbaketals L–N, cytotoxic sesterterpenoids isolated from the marine sponge of the genus Phorbas 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 Phorboxazoles A and B: potent cytostatic macrolides from marine sponge Phorbas species Bioactive Sesterterpenoids from a Korean Sponge <i>Monanchora</i> sp. Phorbazoles AD, novel chlorinated phenylpyrrolyloxazoles from the marine sponge phorbas aff. clathrata Thorectandrols A and B, New Cytotoxic Sesterterpenes from the Marine Sponge <i>Thorectandra</i> Species Eurysterols A and B, Cytotoxic and Antifungal Steroidal Sulfates from a Marine Sponge of the Genus <i>Euryspongia</i> Polyoxygenated Diterpenes from the Sponge <i>Phorbas</i> sp.