Ethyl 2-cyano-5-nitro-6-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 4-cyano-2-iodo-3-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 3-fluoro-4-nitro-6-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 2-cyano-6-nitro-4-(trifluoromethoxy)pyridine-3-acetate