Monanchomycalin C, a New Pentacyclic Guanidine Alkaloid from the Far-Eastern Marine Sponge Monanchora Pulchra

Monanchomycalin C, a New Pentacyclic Guanidine Alkaloid from the Far-Eastern Marine Sponge Monanchora Pulchra Monanchoxymycalins A and B, New Hybrid Pentacyclic Guanidine Alkaloids from the Far-Eastern Marine Sponge Monanchora pulchra Monanchomycalins A and B, unusual guanidine alkaloids from the sponge Monanchora pulchra Monanchoxymycalin C with anticancer properties, new analogue of crambescidin 800 from the marine sponge Monanchora pulchra Normonanchocidins A, B and D, New Pentacyclic Guanidine Alkaloids from the Far-Eastern Marine Sponge Monanchora pulchra Normonanchocidins G and H, New Pentacyclic Guanidine Alkaloids from the Far-Eastern Marine Sponge Monanchora pulchra Monanchocidins B–E: Polycyclic Guanidine Alkaloids with Potent Antileukemic Activities from the Sponge <i>Monanchora pulchra</i> Monanchocidins B–E: Polycyclic Guanidine Alkaloids with Potent Antileukemic Activities from the Sponge <i>Monanchora pulchra</i> Cytotoxic Guanidine Alkaloids from a French Polynesian <i>Monanchora</i> n. sp. Sponge Bioactive Guanidine Alkaloids from Two Caribbean Marine Sponges