Monodontamides A, B, and C, three new putrescine alkaloids from the marine gastropod mollusc Monodonta labio (Linné)

Monodontamides A, B, and C, three new putrescine alkaloids from the marine gastropod mollusc Monodonta labio (Linné) Structures of monodontamides A, B, C, D, E, and F, six new alkaloids isolated from the marine gastropod mollusc Monodonta labio (Linné) Monanchoxymycalins A and B, New Hybrid Pentacyclic Guanidine Alkaloids from the Far-Eastern Marine Sponge Monanchora pulchra Three new cytotoxic alkaloids, aplaminone, neoaplaminone and neoaplaminone sulfate from the marine mollusc aplysia kurodai Ptilomycalin D, a Polycyclic Guanidine Alkaloid from the Marine Sponge Monanchora dianchora Ptilomycalin D, a Polycyclic Guanidine Alkaloid from the Marine Sponge <i>Monanchora dianchora</i> Anti-parasitic Guanidine and Pyrimidine Alkaloids from the Marine Sponge <i>Monanchora arbuscula</i> Bioactive Guanidine Alkaloids from Two Caribbean Marine Sponges Bioactive Guanidine Alkaloids from Two Caribbean Marine Sponges Novel Polycyclic Guanidine Alkaloids from Two Marine Sponges of the Genus <i>Monanchora</i>