乙氧基甲叉丙二酸二乙酯

2,4-dichloro-5-nitrobenzoyl chloride

Ethyl 3-(2,4-dichloro-5-nitrophenyl)-3-oxopropanoate

ethyl ester of 2-(5-nitro-2,4-dichlorobenzoyl)-3-ethoxyacrylic acid