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