Plakinamine L: A New Steroidal Alkaloid from the Marine Sponge Corticium sp

Plakinamine L: A New Steroidal Alkaloid from the Marine Sponge Corticium sp Plakinamine M, a Steroidal Alkaloid from the Marine Sponge Corticium sp. Isolation of Plakinamine I: A New Steroidal Alkaloid from the Marine Sponge Corticium sp. and Synthesis of an Analogue Model Compound Minor Steroidal Alkaloids from the Marine Sponge <i>Corticium</i> sp. Minor Steroidal Alkaloids from the Marine Sponge Corticium sp. New Steroidal Alkaloids from an Undescribed Sponge of the Genus <i>Corticium</i> New Cytotoxic Steroidal Alkaloids from the Philippine Sponge <i>Corticium </i><i>n</i><i>iger</i> New Cytotoxic Steroidal Alkaloids from the Philippine Sponge <i>Corticium </i><i>n</i><i>iger</i> Two Steroidal Alkaloids from a Sponge, Corticium Sp. Plakinamines C and D and Three Other New Steroidal Alkaloids from the SpongeCorticium sp.