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3-[[4-[[4-[ethyl[(4-sulphophenyl)methyl]amino]phenyl]azo]-1-naphthyl]azo]benzenesulphonic acid Structure

3-[[4-[[4-[ethyl[(4-sulphophenyl)methyl]amino]phenyl]azo]-1-naphthyl]azo]benzenesulphonic acid