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tetrasodium 4,4'-[carbonylbis[imino(5-dimethoxy-2-methyl-4,1-phenylene)azo]]bisnaphthalene-2,7-disulphonate Structure

tetrasodium 4,4'-[carbonylbis[imino(5-dimethoxy-2-methyl-4,1-phenylene)azo]]bisnaphthalene-2,7-disulphonate