2-Methyl-2-norbornene 2-Methylbicyclo[2.2.1]hept-2-ene 2-Methylbicyclo[2.2.1]heptene 2-Methylnorbornene 2-Norbornene, 2-methyl- 694-92-8 Bicyclo[2.2.1]hept-2-ene, 2-methyl- NSC135006