. . . . . . . . . . . . "Bicyclo(2.2.1)heptane-2-carbonitrile" . "Bicyclo[2.2.1]heptane-2-carbonitrile" . "Bicyclo(2.2.1)heptane-2-carbonitrile" . . . . . . . . . . "2-Norbornanecarbonitrile" .