Viscosamine:  The First Naturally Occurring Trimeric 3-Alkyl Pyridinium Alkaloid

Viscosamine:  The First Naturally Occurring Trimeric 3-Alkyl Pyridinium Alkaloid Viscosaline: new 3-alkyl pyridinium alkaloid from the Arctic sponge Haliclona viscosa The Arctic sponge Haliclona viscosa as a source of a wide array of 3-alkyl pyridine alkaloids Synthesis of 3-Alkyl Pyridinium Alkaloids from the Arctic Sponge Haliclona viscosa Haliclocyclin C, a New Monomeric 3-Alkyl Pyridinium Alkaloid from the Arctic Marine Sponge Haliclona viscosa Haliclocyclin C, a New Monomeric 3-Alkyl Pyridinium Alkaloid from the Arctic Marine Sponge Haliclona viscosa New haliclamines E and F from the Arctic sponge Haliclona viscosa New haliclamines E and F from the Arctic sponge Haliclona viscosa Two New Haliclamines from the Arctic Sponge Haliclona viscosa Cyclohaliclonamines A−E:  Dimeric, Trimeric, Tetrameric, Pentameric, and Hexameric 3-Alkyl Pyridinium Alkaloids from a Marine Sponge Haliclona sp.