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