Ethyl 3-cyano-5-(difluoromethyl)-6-(trifluoromethoxy)pyridine-2-acetate
Ethyl 3-cyano-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine-6-acetate
Ethyl 3-cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-6-acetate
4-(Difluoromethyl)-3-fluoro-2-methyl-5-(trifluoromethoxy)pyridine