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