ethyl 3-cyclohexyl-2-oxopropanoate

4(1H-吲哚-3-基)-2,4-二氧代丁酸乙酯

N,N-bis(4-chloro-2-nitro-phenyl)oxamide

(4-chloro-2-nitro-phenyl)-oxalamic acid ethyl ester

ethyl N-(2-chlorophenyl)oxamate