(7-Oxo-14-dispiro(5.1.5.1)tetradecanylidene)malononitrile 14-Dicyanomethylenedispiro(5.1.5.1)tetradecan-7-one 73747-72-5 MALONONITRILE, (7-OXO-14-DISPIRO(5.1.5.1)TETRADECANYLIDENE)-