1-methyl-3-phenylimidazolidine-2,4,5-trione

methyl 2-(methylcarbamoylamino)benzoate

1-(2-氰基乙酰基)-1-甲基-3-苯脲

6-amino-3-methyl-5-nitroso-1-phenylpyrimidine-2,4-dione

1-氨基甲酰-3,3-二甲基-1-(2-甲基苯基)脲