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