Methyl 5-cyano-4-(fluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 3-cyano-4-(fluoromethyl)-5-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 3-cyano-2-(fluoromethyl)-6-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 3-cyano-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-6-carboxylate