Cytotoxicity of 2-Geranylgeranyl-1,4-hydroquinone Isolated from Philippine Marine Sponge Carteriospongia sp.Philippine marine spongeCarteriospongia sp.CytotoxicityBiologicallyactive compoundsEmbryonic DevelopmentBioassay-guided purification of the hexane:ethyl acetate extract of the Philippine marine sponge, Carter...