Kuanoniamines A, B, C, and D: pentacyclic alkaloids from a tunicate and its prosobranch mollusk predator Chelynotus semperi

Kuanoniamines A, B, C, and D: pentacyclic alkaloids from a tunicate and its prosobranch mollusk predator Chelynotus semperi A second shermilamine alkaloid from a tunicate Trididemnum sp Three New Alkaloids from the Marine Tunicate <i>Cystodytes violatinctus</i> Cycloshermilamine D, a New Pyridoacridine from the Marine Tunicate <i>Cystodytes violatinctus</i> Three new cytotoxic alkaloids, aplaminone, neoaplaminone and neoaplaminone sulfate from the marine mollusc aplysia kurodai Cycloshermilamine D, a New Pyridoacridine from the Marine Tunicate Cystodytes violatinctus Three New Alkaloids from the Marine Tunicate Cystodytes violatinctus Monanchoxymycalins A and B, New Hybrid Pentacyclic Guanidine Alkaloids from the Far-Eastern Marine Sponge Monanchora pulchra Cystodytins D-I, New Cytotoxic Tetracyclic Aromatic Alkaloids from the Okinawan Marine Tunicate Cystodytes dellechiajei Monanchomycalin C, a New Pentacyclic Guanidine Alkaloid from the Far-Eastern Marine Sponge Monanchora Pulchra