Ethyl 5-bromo-3-cyano-2-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2-bromo-6-cyano-5-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 6-bromo-2-cyano-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2-bromo-3-cyano-6-(trifluoromethoxy)pyridine-4-carboxylate