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