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