Cinachyramine, the novel alkaloid possessing a hydrazone and two aminals from Cinachyrella sp.

Cinachyramine, the novel alkaloid possessing a hydrazone and two aminals from Cinachyrella sp. Zamamiphidins B and C, Manzamine-Related Alkaloids from an Amphimedon sp. Marine Sponge Collected in Okinawa Nakinadine A, a novel bis-pyridine alkaloid with a β-amino acid moiety from sponge Amphimedon sp. Pyrinadine A, a novel pyridine alkaloid with an azoxy moiety from sponge Cribrochalina sp. Nakijinamines C–E, New Heteroaromatic Alkaloids from the Sponge Suberites Species Zamamidine D, a Manzamine Alkaloid from an Okinawan <i>Amphimedon</i> sp. Marine Sponge New 2-Methoxy Acetylenic Acids and Pyrazole Alkaloids from the Marine Sponge Cinachyrella sp. Nakadomarin A, a Novel Hexacyclic Manzamine-Related Alkaloid from Amphimedon Sponge Zamamidines A and B, New Manzamine Alkaloids from the Sponge Amphimedon Species Nakinadines B–F: new pyridine alkaloids with a β-amino acid moiety from sponge Amphimedon sp.