Structure and absolute configuration of 3-alkylpiperidine alkaloids from an Indonesian sponge of the genus Halichondria

Structure and absolute configuration of 3-alkylpiperidine alkaloids from an Indonesian sponge of the genus Halichondria The haliclonacyclamines, cytotoxic tertiary alkaloids from the tropical marine sponge Haliclona sp Two New Haliclamines from the Arctic Sponge Haliclona viscosa A tetracyclic diamine alkaloid, halicyclamine A, from the marine sponge Haliclona sp Tetradehydrohalicyclamine A and 22-Hydroxyhalicyclamine A, New Cytotoxic Bis-piperidine Alkaloids from a Marine Sponge Amphimedon sp. Tetradehydrohalicyclamine A and 22-Hydroxyhalicyclamine A, New Cytotoxic Bis-piperidine Alkaloids from a Marine Sponge <i>Amphimedon</i> sp. Cyclic 3-Alkyl Pyridinium Alkaloid Monomers from a New Zealand <i>Haliclona</i> sp. Marine Sponge Cyclic 3-Alkyl Pyridinium Alkaloid Monomers from a New Zealand <i>Haliclona</i> sp. Marine Sponge Cyclohaliclonamines A−E:  Dimeric, Trimeric, Tetrameric, Pentameric, and Hexameric 3-Alkyl Pyridinium Alkaloids from a Marine Sponge Haliclona sp. Arenosclerins A−C and Haliclonacyclamine E, New Tetracyclic Alkaloids from a Brazilian Endemic Haplosclerid SpongeArenosclerabrasiliensis