ethyl 5-bromo-2-(4-nitrobenzoyl)-1,2,4-benzoxadiazine-3-carboxylate

对硝基苯甲酸甲酯

对硝基苯甲酸乙酯

ethyl p-nitrobenzoylazocarboxylate

tert-butyl N-[(4-nitrophenyl)methyl]carbamate