<i>N</i>-Methylniphatyne A, a New 3-Alkylpyridine Alkaloid as an Inhibitor of the Cancer Cells Adapted to Nutrient Starvation, from an Indonesian Marine Sponge of <i>Xestospongia</i> sp.

&lt;i&gt;N&lt;/i&gt;-Methylniphatyne A, a New 3-Alkylpyridine Alkaloid as an Inhibitor of the Cancer Cells Adapted to Nutrient Starvation, from an Indonesian Marine Sponge of &lt;i&gt;Xestospongia&lt;/i&gt; sp. A new 3-alkylpyridine alkaloid from the marine sponge Haliclona sp. and its cytotoxic activity 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> Niphatesines A–D, new antineoplastic pyridine alkaloids from the okinawan marine sponge Niphates sp. Cytotoxicity of New Diterpene Alkaloids, Ceylonamides G-I, Isolated From Indonesian Marine Sponge of Spongia 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. Monanchomycalin C, a New Pentacyclic Guanidine Alkaloid from the Far-Eastern Marine Sponge Monanchora Pulchra