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