3-(Perfluorophenyl)-6-(trifluoromethyl)pyridine-2-acetonitrile
3-(Perfluorophenyl)-5-(trifluoromethyl)pyridine-2-acetonitrile
3-(Perfluorophenyl)-2-(trifluoromethyl)pyridine-4-acetonitrile
2-(Perfluorophenyl)-6-(trifluoromethyl)pyridine-4-acetonitrile