3-[4-({[(4-methylphenyl)amino]carbonyl}amino)phenyl]-5-{[(2-oxopyrrolidin-1-yl)carbonyl]amino}isothiazol-4-carboxamide

2-[amino(4-nitrophenyl)methylene]malononitrile

5-amino-3-(4-nitrophenyl)isothiazole-4-carbonitrile

methyl 4-[({[4-cyano-3-(4-nitrophenyl)isothiazol-5-yl]amino}carbonyl)amino]butanoate