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