nitrile oxomalononitrile hydrazonomalononitrile C3H2N4 0 NYVGCXQGEYONIC-UHFFFAOYSA-N Beilstein:1903731 InChI=1S/C3H2N4/c4-1-3(2-5)7-6/h6H2 CHEBI:33189 NC-C(=NNH2)-CN NN=C(C#N)C#N chebi_ontology 94.07494 carbonohydrazonoyl dicyanide 94.02795 hydrazone