1,1',3,3'-Tetracyanopropane 1,1,3,3-Propanetetracarbonitrile 1,1,3,3-Tetracyano-propan [German] 3695-98-5 4-02-00-02418 (Beilstein Handbook Reference) BRN 1761679 F 2395 Methylenedimalononitrile NSC 44362