New Cytotoxic Isomalabaricane Triterpenes from the Sponge Jaspis Species

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