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Report a problem with 2-[5-[1-Carboxypentyl-1,3-dihydro-3,3-dimethyl-2H-indol-2-ylidene]-penta-1,3-dienyl]-3,3-dimethyl-1-(4-sulfobutyl)-3H-indolium hydroxide, inner salt (EC: 812-531-2) (CAS 644979-16-8).

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