2-[(4-Nitrophenyl)hydrazono]-3-oxo-butanoic acid ethyl ester

2-{Ethoxycarbonyl-[(4-nitro-phenyl)-hydrazono]-methyl}-isoquinolinium; bromide

3-{3-Methyl-4-[(4-nitro-phenyl)-hydrazono]-5-oxo-4,5-dihydro-pyrazol-1-yl}-N-naphthalen-2-yl-3-oxo-propionamide

ethyl γ-bromo-(4-nitrophenyl)azoacetoacetate

ethyl (Z)-2-(2-(4-nitrophenyl)hydrazineylidene)-2-(2-phenylhydrazineyl)acetate

ethyl 4-hydroxy-1-(p-nitrophenyl)pyrazole-3-carboxylate

(4-Nitro-phenyl)-quinolin-2-yl-cyanamide

N-(5-Acetyl-4-ethoxy-2-oxo-2,5-dihydro-imidazol-1-yl)-N-(4-nitro-phenyl)-acetamide

4,5-Isoxazoledione, 3-methyl-, 4-[(4-nitrophenyl)hydrazone], (Z)-

5-methyl-2-(4-nitro-phenyl)-2H-pyrazole-3,4-dione-4-(4-nitro-phenylhydrazone)

2-[2-(2,4-Dinitro-phenyl)-acetyl]-5-methyl-4-[(4-nitro-phenyl)-hydrazono]-2,4-dihydro-pyrazol-3-one