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tetrasodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[(4-sulphonatophenyl)azo]naphthalene-2-sulphonate] Structure

tetrasodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[(4-sulphonatophenyl)azo]naphthalene-2-sulphonate]