Ethyl 4-(bromomethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
Ethyl 5-hydroxy-2-methyl-3-(trifluoromethoxy)pyridine-6-acetate
Ethyl 4-(bromomethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-5-acetate
Ethyl 5-(bromomethyl)-3-hydroxy-4-(trifluoromethoxy)pyridine-2-acetate