Niphatoxin A and B; two new ichthyo- and cytotoxic tripyridine alkaloids from a marine sponge

Niphatoxin A and B; two new ichthyo- and cytotoxic tripyridine alkaloids from a marine sponge Niphatoxin C, a Cytotoxic Tripyridine Alkaloid from Callyspongia sp. Niphatesines E–H, new pyridine alkaloids from the Okinawan marine sponge Niphates sp. Niphatesines E–H, new pyridine alkaloids from the Okinawan marine sponge Niphates sp. Niphatesines A–D, new antineoplastic pyridine alkaloids from the okinawan marine sponge Niphates sp. Niphatynes, methoxylamine pyridines from the marine sponge, niphates SP. Hachijodines A−G:  Seven New Cytotoxic 3-Alkylpyridine Alkaloids from Two Marine Sponges of the Genera <i>Xestospongia </i>and <i>Amphimedon</i> Hachijodines A−G:  Seven New Cytotoxic 3-Alkylpyridine Alkaloids from Two Marine Sponges of the Genera <i>Xestospongia </i>and <i>Amphimedon</i> Aaptamine-Related Alkaloid from the Marine Sponge Aaptos aaptos Pyrinadines B–G, new bis-pyridine alkaloids with an azoxy moiety from sponge Cribrochalina sp.