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