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