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3-(2-hydroxyethyl)-2-[(1E)-2-{(Z)-[3-(2-hydroxyethyl)-5-methoxy-1,3-benzothiazol-2(3H)-ylidene]methyl}but-1-en-1-yl]-5-methoxy-1,3-benzothiazol-3-ium 4-methylbenzenesulfonate related products: