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