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