2-Aminoisobutyrophenon-p-nitrophenylhydrazon-hydrochlorid

3-Anilino-4-ethoxy-5,5-dimethyl-4-phenylimidazolidin-2-on

4-Hydroxy-5,5-dimethyl-4-phenyl-3-(o-toluidino)imidazolidin-2-on

2,2-diethyl-1,5,5-trimethyl-4-phenyl-2,5-dihydro-1H-imidazole 3-oxide