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The chemical structure of sponge derived molecules. (A) Xestospongin C (Xestospongia sp./macrocyclic bis-oxaquinolizidine. (B) Ara-A (Cryptotethia crypta/unusal nucleoside). (C) Contignasterol (Petrosia contignata/oxygenated sterol). (D) Jaspamide (Hemiastrella minor/macrocyclic lactam/lactone). (E) Manolide (Sesterterpenoids/Luffariella variabilis sp). (F) Agelasphin (Agelas mauritianus/agalactosy-ceramide).
