(Bis(3,5-bis(1,1-dimethylethyl)-4-oxo-2,5-cyclohexadien-1-ylidene)cyclopropylidene)propanedinitrile 63165-89-9 Propanedinitrile, (bis(3,5-bis(1,1-dimethylethyl)-4-oxo-2,5-cyclohexadien-1-ylidene)cyclopropylidene)-