ethyl 2-(N-phenylcarbamoyl)propanoate

3-methyl-1-phenyl-2,4-azetidinedione

ethyl 7-methyl-3-phenyl-2,4-dioxo-1,2,3,4-tetrahydropyrido<2,3-d>pyrimidine-5-carboxylate

N-氨基甲酰-N-苯基氨基甲酸乙酯

4-phenylcarbamoyl-allophanic acid ethyl ester