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