il nome corretto del composto dovrebbe essere "norbornenyl"

http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=...

"cycloalkylene radicals, monocyclic such as, for example, the cyclopentenyl, cyclohexenyl, cycloheptenyl or cyclooctenyl radical, bicyclic such as, for example, the norbornenyl or the bicyclo[2,2,2]octenyl radical, or fused, such as the various dihydro- or tetrahydronaphthyl radicals"

dovrebbe derivare dal norbornene, nome che rimane invariato in italiano,

ma per "norbornenile" non ho trovato riscontri...