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