1,3,4,6-Tetrachloroglycoluril

1,3,4,6-tetrachloro-3a,6a-dihydroimidazo[4,5-d]imidazole-2,5-dione

1,3,4,6-tetrachloro-3a,6a-dihydroimidazo[4,5-d]imidazole-2,5-quinone

1,3,4,6-tetrachlorotetrahydroimidazo(4,5-d)imidazole-2,5(1h,3h)-dione

3,3a,6,6a-Tetrahydro-1,3,4,6-tetrachloroimidazo[4,5-d]imidazole-2,5(1H,4H)-dione

1,3,4,6-Tetrachloro-3a,4,6,6a-tetrahydroimidazo[4,5-d]imidazole-2,5(1H,3H)-dione