4-hydroxy-5-[[4-[[4-[[1-hydroxy-6-(phenylamino)-3-sulpho-2-naphthyl]azo]-6-sulphonaphthyl]azo]naphthyl]azo]naphthalene-2,7-disulphonic acid

4-Hydroxy-5-[4-[4-(1-hydroxy-6-phenylamino-3-sulfo-2-naphthalenylazo)-6-sulfo-1-naphthalenylazo]-1-naphthalenylazo]-2,7-naphthalenedisulfonic acid

4-Hydroxy-5-[[4-[[4-[(1-hydroxy-6-phenylamino-3-sulfo-2-naphthalenyl)azo]-6-sulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]-2,7-naphthalenedisulfonic acid