3-Oxatricyclo[3.2.1.02,4]octane, (1.alpha.,2.beta.,4.beta.,5.alpha.)- 3-Oxatricyclo[3.2.1.02,4]octane, exo- 3146-39-2 NSC196237 Norbornane, 2,3-epoxy-, exo- exo-2,3-Epoxynorbornane exo-2,3-Oxidonorbornane exo-2,exo-3-Epoxybicyclo[2.2.1]heptane exo-Norbornene oxide