Methyl 3-nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-5-carboxylate
Ethyl 2-nitro-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-5-carboxylate
Methyl 3-nitro-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-4-carboxylate
Methyl 3-nitro-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-5-carboxylate