3-[(3'-Carbamoyl-1',4'-dihydropyridin-1'-yl)acetyloxymethyl]-5,5-diphenyl-2,4-imidazolidinedione

<(2,4-dioxo-5,5-diphenyl-3-imidazolidinyl)methyl>-1,4-dihydro-3-carbamoylpyridine-1-propionate

(2,5-dioxo-4,4-diphenylimidazolidin-1-yl)methyl acetate

2,5-bis-methylsulfanyl-4,4-diphenyl-4H-imidazole

5,5-diphenyl-N-acetylhydantoin