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