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Poly(oxy-1,2-ethanediyl), α-hydro-ω-hydroxy-, ether with N-[4-[[4-[bis(2-hydroxyethyl) amino]-2-methylphenyl](2-sulfophenyl)methylene ]-3-methyl-2,5-cyclohexadien-1-ylidene]-2-hydrox y-N-(2-hydroxyeth related products: