1-(2-methylpropyl)-3-[4-(4-nitrophenyl)sulfonylphenyl]thiourea

N,N'-bis[4-(4-nitrophenyl)sulfonylphenyl]methanimidamide

N-[4-(4-nitrophenyl)sulfonylphenyl]-1-[4-[[4-(4-nitrophenyl)sulfonylphenyl]iminomethyl]phenyl]methanimine

N,N-diethyl-4-[[4-(4-nitrophenyl)sulfonylphenyl]iminomethyl]aniline

N-[4-(5-nitrothiophen-2-yl)sulfonylphenyl]acetamide