6-[(2,5-dimethoxyanilino)methylidene]-4-nitrocyclohexa-2,4-dien-1-one

6-amino-2-oxochromene-3-carboxylic acid

2-[[2-hydroxyethyl(methyl)amino]methyl]-4-nitrophenol

2-[(2-hydroxy-5-nitrophenyl)methylidene]butanal

(6E)-6-[[2,2-bis(2-methylpropyl)hydrazinyl]methylidene]-4-nitrocyclohexa-2,4-dien-1-one