m-[[[5-hydroxy-6-[[2-(methylsulphonyl)-4-nitrophenyl]azo]-1-naphthyl]amino]sulphonyl]benzenesulphonyl fluoride

3-[[[5-Hydroxy-6-[[2-(methylsulfonyl)-4-nitrophenyl]azo]-1-naphthalenyl]amino]sulfonyl]benzenesulfonyl fluoride