4-Amino-6-((4'-((6-amino-1-hydroxy-3-sulfo-2-naphthyl)diazenyl)[1,1'-biphenyl]-4-yl)diazenyl)-3-((2,5-dichlorophenyl)diazenyl)-5-hydroxy-2,7-naphthalenedisulfonic acid AIDS-125604 AIDS125604 NSC77521