2-(Difluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine-5-carboxamide
2-(Difluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine-6-carboxamide
4-Methyl-2-nitro-3-(trifluoromethoxy)pyridine-5-carboxamide
3-Methyl-5-nitro-6-(trifluoromethoxy)pyridine-2-carboxamide