((4-Chlorophenyl)hydrazono)propanedinitrile 3-15-00-00268 (Beilstein Handbook Reference) 946-76-9 BRN 1842095 Carbonylcyanide 4-chlorophenylhydrazone Mesoxalonitrile, (p-chlorophenyl)hydrazone Propanedinitrile, ((4-chlorophenyl)hydrazono)-