Amantamide C, an Antitrypanosomal Linear Lipopeptide from a Marine <i>Okeania</i> sp. Cyanobacterium

Amantamides are lipopeptides that act as selective CXC chemokine receptor 7 agonists and modulate spontaneous calcium oscillations in primary cultured neocortical neurons. We isolated a new analog of amantamides, amantamide C, from marine Okeania sp. cyanobacterium collected in Japan and established its structure based on NMR and MS/MS analyses, and degradation reactions. In addition, we evaluated the biological activity of amantamide C and revealed novel biological features of amantamide-type compounds.