Zarzissine, a New Cytotoxic Guanidine Alkaloid from the Mediterranean Sponge Anchinoe paupertas

Zarzissine, a New Cytotoxic Guanidine Alkaloid from the Mediterranean Sponge Anchinoe paupertas 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> Pyrinadine A, a novel pyridine alkaloid with an azoxy moiety from sponge Cribrochalina sp. Densazalin, a New Cytotoxic Diazatricyclic Alkaloid from the Marine Sponge Haliclona densaspicula Zyzzyanones B−D, Dipyrroloquinones from the Marine Sponge <i>Zyzzya </i><i>f</i><i>uliginosa</i> Zyzzyanones B−D, Dipyrroloquinones from the Marine Sponge <i>Zyzzya </i><i>f</i><i>uliginosa</i> Pyrinadines B–G, new bis-pyridine alkaloids with an azoxy moiety from sponge Cribrochalina sp. Zorrimidazolone, a Bioactive Alkaloid from the Non-Indigenous Mediterranean Stolidobranch Polyandrocarpa zorritensis A new 3-alkylpyridine alkaloid from the marine sponge Haliclona sp. and its cytotoxic activity