1,7,7-Trimethyl-2-norbornene 1,7,7-Trimethylbicyclo[2.2.1]hept-2-ene 1,7,7-Trimethylnorbornene 2-Bornene 464-17-5 Bicyclo[2.2.1]hept-2-ene, 1,7,7-trimethyl- Bornylene NSC193373