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