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