Ethyl 2-(fluoromethyl)-3-methoxy-5-(trifluoromethoxy)pyridine-6-acetate
Methyl 4-(fluoromethyl)-6-methoxy-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 5-(fluoromethyl)-3-methoxy-4-(trifluoromethoxy)pyridine-2-acetate
Methyl 6-(fluoromethyl)-3-methoxy-2-(trifluoromethoxy)pyridine-4-carboxylate