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