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