Three new bromotyrosine derivatives lethal to crab from the marine sponge, Pseudoceratina purpurea

Three new bromotyrosine derivatives lethal to crab from the marine sponge, Pseudoceratina purpurea Two New Bromotyrosine Derivatives from the Marine Sponge Pseudoceratina sp. Brominated derivatives from the Chinese spongePseudoceratinasp. New Antimicrobial Bromotyrosine Analogues from the Sponge Pseudoceratina purpurea and Its Predator Tylodina corticalis 20-<i>N</i>-Methylpurpuramine E: New Bromotyrosine-Derived Metabolite from Okinawan Marine Sponge <i>Pseudoceratina purpurea</i> Ceratinamides A and B: New antifouling dibromotyrosine derivatives from the marine sponge Pseudoceratina purpurea Ceratinadins A–C, new bromotyrosine alkaloids from an Okinawan marine sponge Pseudoceratina sp. Bromotyrosine Alkaloids from the Australian Marine Sponge Pseudoceratina verrucosa Bromotyrosine Alkaloids from the Sponge <i>Pseudoceratina verrucosa</i> Dibromotyrosine Derivatives, a Maleimide, Aplysamine-2 and Other Constituents of the Marine Sponge Pseudoceratina purpurea