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