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