2-Methyl-5-(4-nitro-phenyl)-1-phenyl-1H-pyrrole-3-carboxylic acid ethyl ester

Butanoic acid, 2-[(2-nitrophenyl)hydrazono]-3-oxo-, ethyl ester (en)

4-[(4-chlorophenyl)methylidene]-3-methyl-1,2-oxazol-5-one

2-((3-NITRO-PHENYL)-HYDRAZONO)-3-OXO-BUTYRIC ACID ETHYL ESTER

1,5-bis-(3-nitro-phenyl)-formazan-3-carboxylic acid ethyl ester