1,3-Diazetidine-2,4-dione, 1,3-diphenyl- 1,3-Diphenyl-2,4-dioxodiazetidine 1,3-Diphenyl-2,4-uretidinedione 1025-36-1 2,4-Uretidinedione, 1,3-diphenyl- Diphenyl-2,4-uretidinedione N,N'-DIPHENYLURETIDIONE N,N'-Diphenyluretidine-2,4-dione NSC194712 Phenyl isocyanate dimer