166090-86-4 2-Norbornene, polymer with ethylene 26007-43-2 Apel APL 5018 Bicyclo(2.2.1)hept-2-ene, polymer with ethene Ethyledennorbornene [Russian] Ethylene-2-norbornene copolymer Ethylene-norbornene copolymer Ethylene-norbornene polymer