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