5-Norbornene-2-carboxylic acid, exo- 934-30-5 Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid, exo- NSC155661 WLN: L55 A CUTJ FVQ exo-5-Norbornene-2-carboxylic acid exo-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid