sodium 2-[[3-[(8-acetamido-2-hydroxy-1-naphthyl)azo]-4-hydroxyphenyl]sulphonyl]ethyl sulphate

N-[7-Hydroxy-8-[[2-hydroxy-5-[[2-[(sodiosulfo)oxy]ethyl]sulfonyl]phenyl]azo]-1-naphthalenyl]acetamide