2,7-Naphthalenedisulfonic acid, 5-amino-3-[2-[4-[2-[4-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]phenyl]diazenyl]phenyl]diazenyl]-4-hydroxy-, sodium salt, 2,7-Naphthalenedisulfonic acid, 5-amino-3-(2-(4-(2-(4-(2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)phenyl)diazenyl)phenyl)diazenyl)-4-hydroxy-, sodium salt, Trisodium 5-amino-3-((4-((4-((7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)phenyl)azo)phenyl)azo)-4-hydroxynaphthalene-2,7-disulphonate