Keramamides K and L, new cyclic peptides containing unusual tryptophan residue from Theonella sponge

Keramamides K and L, new cyclic peptides containing unusual tryptophan residue from Theonella sponge Keramamides M and N, two new cyclic peptides with a sulfate ester from Theonella sponge Keramamides E, G, H, and J, new cyclic peptides containing an oxazole or a thiazole ring from a Theonella sponge Keramamide A, a novel peptide from the Okinawan marine sponge Theonella sp. The Kapakahines, Cyclic Peptides from the Marine Sponge <i>Cribrochalina olemda</i> Keramamine-A and -B, novel antimicrobial alkaloids from the Okinawan marine sponge sp. Keramaphidin C and keramamine C plausible biogenetic precursors of manzamine C from an Okinawan marine sponge Calyxamides A and B, Cytotoxic Cyclic Peptides from the Marine Sponge <i>Discodermia calyx</i> Calyxamides A and B, Cytotoxic Cyclic Peptides from the Marine Sponge <i>Discodermia calyx</i> Hymenamides C ~ E, new cyclic heptapeptides with two proline residues from the okinawan marine sponge hymeniacidon sp.