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