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