Two new polycyclic aromatic alkaloids from the Okinawan marine sponge Biemna sp.

Two new polycyclic aromatic alkaloids from the Okinawan marine sponge Biemna sp. Pyrinodemins B-D, Potent Cytotoxic bis-Pyridine Alkaloids from Marine Sponge Amphimedon sp. Pyrinodemins B-D, Potent Cytotoxic bis-Pyridine Alkaloids from Marine Sponge Amphimedon sp. Nakinadine A, a novel bis-pyridine alkaloid with a β-amino acid moiety from sponge Amphimedon sp. Two cell differentiation inducing pyridoacridines from a marine sponge Biemna sp. and their chemical conversions Nakinadines B–F: new pyridine alkaloids with a β-amino acid moiety from sponge Amphimedon sp. Ascididemin, a novel pentacyclic aromatic alkaloid with potent antileukemic activity from the okinawan tunicate didemnum sp. Pyrinodemin A, a cytotoxic pyridine alkaloid with an isoxazolidine moiety from sponge Amphimedon sp Zamamiphidins B and C, Manzamine-Related Alkaloids from an Amphimedon sp. Marine Sponge Collected in Okinawa Nakijinamines C–E, New Heteroaromatic Alkaloids from the Sponge Suberites Species