New Cytotoxic Furanosesterterpenes from an Okinawan Marine Sponge, Ircinia sp.

New Cytotoxic Furanosesterterpenes from an Okinawan Marine Sponge, <i>Ircinia</i> sp. Cytotoxic C₂₁ and C₂₂ Terpenoid-Derived Metabolites from the Sponge <i>Ircinia</i> sp. Antiprotozoal Linear Furanosesterterpenoids from the Marine Sponge <i>Ircinia oros</i> New Cytotoxic Sesterterpenes from the Sponge <i>Sarcotragus</i> Species Cytotoxic Furanosesterterpenes from a Marine Sponge <i>Psammocinia </i>sp. Ircinamine, a Novel Cytotoxic Alkaloid from <i>Ircinia</i> sp. Sesterterpenoids from the Sponge <i>Sarcotragus</i> sp. Three New Cytotoxic Sesterterpenes from a Marine Sponge <i>Spongia </i>sp. Cytotoxic Pyrrolo- and Furanoterpenoids from the Sponge <i>Sarcotragus</i> Species Cytotoxic Pyrrolo- and Furanoterpenoids from the Sponge <i>Sarcotragus</i> Species