2-Chloro-5-cyano-3-(trifluoromethoxy)pyridine-6-acetonitrile
5-Bromo-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-3-acetonitrile
2-Chloro-4-cyano-6-(trifluoromethoxy)pyridine-3-acetonitrile
4-Bromo-5-(fluoromethyl)-2-(trifluoromethoxy)pyridine-3-acetonitrile