An efficient approach to the azaspirocyclic structure of halichlorine and pinnaic acid

An efficient approach to the azaspirocyclic structure of halichlorine and pinnaic acid Asymmetric total synthesis strategies of halichlorine and pinnaic acid Pinnarine, Another Member of the Halichlorine Family. Isolation and Preparation from Pinnaic Acid Haliclorensin, a Novel Diamino Alkaloid from the Marine Sponge <i>Haliclona </i><i>t</i><i>ulearensis</i> Haliclorensin, a Novel Diamino Alkaloid from the Marine Sponge <i>Haliclona </i><i>t</i><i>ulearensis</i> An Efficient Synthesis of 3‐Alkylpyridine Alkaloids Enables Their Biological Evaluation 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 Structures and Functions of Marine Bioactive Alkaloids. Cyclohaliclonamines A−E:  Dimeric, Trimeric, Tetrameric, Pentameric, and Hexameric 3-Alkyl Pyridinium Alkaloids from a Marine Sponge Haliclona sp.