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4-Chloro-2-ethyl-5-[[3-[[(2-chloro-3-ethoxyphenyl)amino]carbonyl]-2-hydroxy-1-naphtyl]azo]benzenesulfonic acid sodium salt Structure

4-Chloro-2-ethyl-5-[[3-[[(2-chloro-3-ethoxyphenyl)amino]carbonyl]-2-hydroxy-1-naphtyl]azo]benzenesulfonic acid sodium salt