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trisodium 2-[2-(4-nitro-2-sulphonatophenyl)vinyl]-5-[[4-[(4-sulphonatophenyl)azo]phenyl]-NNO-azoxy]benzenesulphonate Structure

trisodium 2-[2-(4-nitro-2-sulphonatophenyl)vinyl]-5-[[4-[(4-sulphonatophenyl)azo]phenyl]-NNO-azoxy]benzenesulphonate