Pyrinadines B–G, new bis-pyridine alkaloids with an azoxy moiety from sponge Cribrochalina sp.

Six new cytotoxic bis-3-alkylpyridine alkaloids with an azoxy moiety, pyrinadines B–G (1–6), have been isolated from an Okinawan marine sponge Cribrochalina sp., and the structures were elucidated by spectroscopic data and chemical means.

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