4-Cyano-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine-3-acetonitrile
3-Cyano-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-acetonitrile
3-Cyano-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-acetonitrile
6-Cyano-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetonitrile