Dimethyl(4-((4-(dimethylamino)phenyl)benzylidene)-2,5-cyclohexadien-1-ylidene)ammonium sulphate (2:1);[4-[[2-(4-dimethylaminophenyl)phenyl]methylene]-1-cyclohexa-2,5-dienylidene]-dimethyl-ammonium sulfate
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