Ethyl 4-cyano-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-2-acetate
Ethyl 4-cyano-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 4-fluoro-2-methyl-5-(trifluoromethoxy)pyridine-3-carboxylate
6-Cyano-3-fluoro-4-(fluoromethyl)-2-(trifluoromethoxy)pyridine