Keramamides E, G, H, and J, new cyclic peptides containing an oxazole or a thiazole ring from a Theonella sponge

Keramamides E, G, H, and J, new cyclic peptides containing an oxazole or a thiazole ring from a Theonella sponge Keramamides M and N, two new cyclic peptides with a sulfate ester from Theonella sponge Keramamides K and L, new cyclic peptides containing unusual tryptophan residue from Theonella sponge Keramamide A, a novel peptide from the Okinawan marine sponge Theonella sp. Hymenamides G, H, J, and K, four new cyclic octapeptides from the Okinawan marine sponge Hymeniacidon sp. 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. Theonellamides A-E, cytotoxic bicyclic peptides, from a marine sponge Theonella sp. Oriamide, a new cytotoxic cyclic peptide containing a novel amino acid from the marine sponge Theonella sp