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1H-Pyrazolium,3-(4-bromophenyl)-1-[4-[4-[3-(4-bromophenyl)-4,5-dihydro-5-phenyl-1H-pyrazolium-1-ylidene]-2,5-cyclohexadien-1-ylidene]-2,5-cyclohexadien-1-ylidene]-4,5-dihydro-5-phenyl- related products: