161042-10-0 2-((2-Methyl-1-oxo-2-propenyl)oxy)ethyl 2,3,5-triiodobenzoate 2-(2',3',5'-Triiodobenzoyl)ethyl methacrylate 3IBzEt-Methacrylate Benzoic acid, 2,3,5-triiodo-, 2-((2-methyl-1-oxo-2-propenyl)oxy)ethyl ester