2-(4-{[6-({4-[(6-{[4-(Carboxymethyl)phenyl]diazenyl}-5-hydroxy-7-sulfo(2-naphthyl))amino]-2,3-dioxocyclobut-1(4)-enyl}amino)-1-hydroxy-3-sulfo-2-naphthyl]diazenyl}phenyl)acetic acid AIDS-104474 AIDS104474