Ingamines A and B, new cytotoxic alkaloids from the marine sponge Xestospongia ingens

Ingamines A and B, new cytotoxic alkaloids from the marine sponge Xestospongia ingens Ingenamine, a novel pentacyclic alkaloid from the marine sponge Xestospongia ingens Madangamines B−E, Pentacyclic Alkaloids from the Marine Sponge Xestospongia ingens Ingenamine alkaloids isolated from the sponge Xestospongia ingens: Structures and absolute configurations Ingenines A and B, Two New Alkaloids from the Indonesian Sponge Acanthostrongylophora ingens Two New Alkaloids from Xestospongia sp., a New Caledonian Sponge Two New Alkaloids from Xestospongia sp., a New Caledonian Sponge A New Quinolizidine Alkaloid from the Papua New Guinean Sponge <i>Xestospongia exigua</i> A New Quinolizidine Alkaloid from the Papua New Guinean Sponge Xestospongia exigua Hachijodines A−G:  Seven New Cytotoxic 3-Alkylpyridine Alkaloids from Two Marine Sponges of the Genera <i>Xestospongia </i>and <i>Amphimedon</i>