1-(2-(4,5-Dioxo-3-phenyl-2-thioxo-1-imidazolidinyl)ethyl)-2,3-piperazinedione 132411-95-1 2,3-Piperazinedione, 1-(2-(4,5-dioxo-3-phenyl-2-thioxo-1-imidazolidinyl)ethyl)- 3-(beta-(2',3'-Diketopiperazine)ethylene)-1-phenyl-2-thioxo-4,5-imidazolidinedione