Purpuramines A-I, new bromotyrosine-derived metabolites from the marine sponge Psammaplysilla purpurea

Purpuramines A-I, new bromotyrosine-derived metabolites from the marine sponge Psammaplysilla purpurea Two New Bromotyrosine-Derived Metabolites from the Sponge Psammaplysilla purpurea New bromotyrosine alkaloids from the marine sponge Psammaplysilla purpurea New bromotyrosine alkaloids from the marine sponge Psammaplysilla purpurea 20-<i>N</i>-Methylpurpuramine E: New Bromotyrosine-Derived Metabolite from Okinawan Marine Sponge <i>Pseudoceratina purpurea</i> Novel Bromine-Containing Constituents of the Sponge <i>Psammaplysilla </i><i>p</i><i>urpurea</i> A New Dibromotyrosine-Derived Metabolite from the Sponge <i>Psammaplysilla</i> <i>purpurea</i> Novel marine sponge derived amino acids 13. Additional psammaplin derivatives from Psammaplysilla purpurea Three New Bromotyrosine-Derived Metabolites of the Sponge Psammaplysilla purpurea Three New Bromotyrosine-Derived Metabolites of the Sponge Psammaplysilla purpurea