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