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