1,3,4,6-Tetrachloro-3a,6a-diphenylglycoluril 1,3,4,6-Tetrachlorotetrahydro-3a, 6a-diphenylimidazo(4,5-d)imidazole-2,5(1H,3H)-dione 1-26-00-00148 (Beilstein Handbook Reference) 51592-06-4 BRN 0363328 GLYCOLURIL, 1,3,4,6-TETRACHLORO-3a,6a-DIPHENYL- Imidazo(4,5-d)imidazole-2,5(1H,3H)-dione, 1,3,4,6-tetrachlorotetrahydro-3a,6a-diphenyl- Iodo-gen NSC 4462