.delta.2,2'-Bimalononitrile 1,1,2,2-Ethylenetetracarbonitrile 670-54-2 AIDS-124363 AIDS124363 Ethene, tetracyano- Ethenetetracarbonitrile Ethylenetetracarbonitrile NSC24833 TCNE Tetracyanoethene Tetracyanoethylene