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