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2-Hydroxy-5-[N-[5-hydroxy-6-[[2-sodiosulfo-4-[(4-sodiosulfophenyl)azo]phenyl]azo]-7-sodiosulfo-2-naphthalenyl]-N-methylaminosulfonyl]benzoic acid sodium salt Structure

2-Hydroxy-5-[N-[5-hydroxy-6-[[2-sodiosulfo-4-[(4-sodiosulfophenyl)azo]phenyl]azo]-7-sodiosulfo-2-naphthalenyl]-N-methylaminosulfonyl]benzoic acid sodium salt