Monanchorin, a Bicyclic Alkaloid from the Sponge Monanchora ungiculata

Monanchorin, a Bicyclic Alkaloid from the Sponge <i>Monanchora </i><i>u</i><i>ngiculata</i> Alkaloids from the Sponge <i>Monanchora </i><i>u</i><i>nguifera</i> Alkaloids from the Sponge Monanchora unguifera Novel Polycyclic Guanidine Alkaloids from Two Marine Sponges of the Genus <i>Monanchora</i> Cytotoxic Guanidine Alkaloids from a French Polynesian <i>Monanchora</i> n. sp. Sponge Novel Polycyclic Guanidine Alkaloids from Two Marine Sponges of the Genus Monanchora Ptilomycalin D, a Polycyclic Guanidine Alkaloid from the Marine Sponge Monanchora dianchora Monanchoxymycalins A and B, New Hybrid Pentacyclic Guanidine Alkaloids from the Far-Eastern Marine Sponge Monanchora pulchra Ptilomycalin D, a Polycyclic Guanidine Alkaloid from the Marine Sponge <i>Monanchora dianchora</i> Monanchomycalins A and B, unusual guanidine alkaloids from the sponge Monanchora pulchra