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