New Isomalabaricane Derivatives from a New Species of Jaspis Sponge Collected at the Vanuatu Islands

New Isomalabaricane Derivatives from a New Species of <i>Jaspis</i> Sponge Collected at the Vanuatu Islands New Cytotoxic Isomalabaricane Triterpenes from the Sponge <i>Jaspis</i> Species Globostellatic Acids A−D, New Cytotoxic Isomalabaricane Triterpenes from the Marine Sponge <i>Stelletta globostellata</i> New Jaspamide Derivatives from the Marine Sponge <i>Jaspis splendans</i> Collected in Vanuatu New Jaspamide Derivatives from the Marine Sponge <i>Jaspis splendans</i> Collected in Vanuatu New Isomalabaricane Triterpenes from the Marine Sponge Stelletta globostellata That Induce Morphological Changes in Rat Fibroblasts Cytotoxic Isomalabaricane Triterpenes from the Marine Sponge Rhabdastrella globostellata Bioactive Isomalabaricane Triterpenes from the Marine Sponge <i>Rhabdastrella </i><i>g</i><i>lobostellata</i> Cytotoxic Isomalabaricane Derivatives and a Monocyclic Triterpene Glycoside from the Sponge <i>Rhabdastrella globostellata</i> Stellettins L and M, Cytotoxic Isomalabaricane-Type Triterpenes, and Sterols from the Marine Sponge Stelletta tenuis