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