methyl 2-[(2-ethoxy-2-oxoethyl)amino]benzoate

5-苯基吗啉-3-酮

1,4-diphenylpiperazine-2,5-dione

ethyl (2Z)-2-chloro-2-[(3-nitrophenyl)hydrazinylidene]acetate

4-氟-3-氧代丁酸乙酯