A New Cytotoxic Sterol Methoxymethyl Ether from a Deep Water Marine Sponge Scleritoderma sp. cf. paccardi

A New Cytotoxic Sterol Methoxymethyl Ether from a Deep Water Marine Sponge <i>Scleritoderma</i> sp. cf. <i>paccardi</i> Three New Cytotoxic Sesterterpenes from the Marine Sponge <i>Hyrtios</i> cf. <i>erectus</i> Isolation of a New Mycalolide from the Marine Sponge <i>Mycale izuensis</i> Isolation of a New Mycalolide from the Marine Sponge Mycale izuensis Three New Cytotoxic Sesterterpenes from a Marine Sponge <i>Spongia </i>sp. 5,6:8,9-Diepoxy and Other Cytotoxic Sterols from the Marine Sponge <i>Homaxinella</i> sp. Novel Cytotoxic Oxygenated C29 Sterols from the Colombian Marine Sponge <i>Polymastia </i><i>t</i><i>enax</i> Five New Discodermolide Analogues from the Marine SpongeDiscodermiaSpecies Cytotoxic Sterol Derivatives from a Marine Sponge <i>Homaxinella </i>sp. Five New Discodermolide Analogues from the Marine Sponge<i>Discodermia</i>Species