The first cyclic monomeric 3-alkylpyridinium alkaloid from natural sources: identification, synthesis, and biological activity

The first cyclic monomeric 3-alkylpyridinium alkaloid from natural sources: identification, synthesis, and biological activity Haliclocyclin C, a New Monomeric 3-Alkyl Pyridinium Alkaloid from the Arctic Marine Sponge Haliclona viscosa 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 Haliclocyclin C, a New Monomeric 3-Alkyl Pyridinium Alkaloid from the Arctic Marine Sponge Haliclona viscosa Cyclohaliclonamines A−E:  Dimeric, Trimeric, Tetrameric, Pentameric, and Hexameric 3-Alkyl Pyridinium Alkaloids from a Marine Sponge Haliclona sp. Synthesis of 3-Alkyl Pyridinium Alkaloids from the Arctic Sponge Haliclona viscosa 3-Alkylpyridinium Alkaloids from the Pacific Sponge <i>Haliclona</i> sp. 3-Alkylpyridinium Alkaloids from the Pacific Sponge <i>Haliclona</i> sp. Pachychalines A–C: Novel 3‐Alkylpyridinium Salts from the Marine Sponge Pachychalina sp.