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