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