methyl 4-(3-(4-carbamoyl-3-(4-nitrophenyl)isothiazol-5-yl)ureido)butanoate

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