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disodium 5-[[2,4-dihydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-5-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonate Structure

disodium 5-[[2,4-dihydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-5-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonate