2-(Bis(3,5-bis(1,1-dimethylethyl)-4-oxo-2,5-cyclohexadien-1-ylidene)cyclopropylidene)-4,5-dichloro-4-cyclopentene-1,3-dione 4-Cyclopentene-1,3-dione, 2-(bis(3,5-bis(1,1-dimethylethyl)-4-oxo-2,5-cyclohexadien-1-ylidene)cyclopropylidene)-4,5-dichloro- 63165-93-5