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