2-phenyl-2-ureidoacetonitrile

tert-butyl 4-carbamoylpiperazine-1-carboxylate

1-methyl-1-propylurea

3-[(4-methylphenyl)-phenylmethyl]-2H-1,2,4-oxadiazol-5-one

3-[(4-chlorophenyl)-phenylmethyl]-2H-1,2,4-oxadiazol-5-one