3-(4-chlorophenyl)-4-phenylazo-1H-pyrazole-5-carboxylic acid ethyl ester

ethyl 3-(4-chlorophenyl)-4-nitroso-1H-pyrazole-5-carboxylate

重氮乙酸乙酯

对氯苯乙腈

ethyl 4-(4-chlorophenyl)-2,4-dioxo-3-(phenyldiazenyl)butanoate