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