Ethyl 3-(chloromethyl)-2-hydroxy-5-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 3-(chloromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 6-(chloromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2-(chloromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxylate