Ethyl [(4-bromophenyl)amino](oxo)acetate

1,4-二氢-6,7-二甲基-2,3-喹喔啉二酮

2-乙基-3-氧代琥珀酸二乙酯

ethyl 2-oxo-2-(2-phenylhydrazinyl)acetate

1-N',2-N'-diphenylethanedihydrazide