malononitrile oxomalononitrile 80.00106 chebi_ontology oxopropanedinitrile CHEBI:33187 O=C(C#N)C#N mesoxalonitrile JSGHQDAEHDRLOI-UHFFFAOYSA-N 0 NC-CO-CN oxomalononitrile InChI=1S/C3N2O/c4-1-3(6)2-5 80.04498 CAS:1115-12-4 Gmelin:217598 C3N2O carbonyl dicyanide Beilstein:1699394 alpha-ketonitrile