4-methoxyphenyl 4-nitrophenyl sulfone

(E)-3-benzyl-1-(4-nitrophenyl)triaz-1-ene

(E)-N-(3-cyanophenyl)-N'-(4-nitrophenyl)acetimidamide

N-Pyrrolylmethylene p-nitroaniline

1-Diethylamino-3-(4-nitrophenylimino)-1,2-diphenyl-1-propen