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disodium 5,5'-[(1,4-dioxobut-2-ene-1,4-diyl)bis(imino-p-phenyleneazo)]disalicylate  Structure

disodium 5,5'-[(1,4-dioxobut-2-ene-1,4-diyl)bis(imino-p-phenyleneazo)]disalicylate