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