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