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