85631-87-4

trisodium 4-hydroxy-5-[[2-hydroxy-4-[[3-hydroxy-4-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]phenyl]amino]phenyl]azo]-3-[(4-methoxyphenyl)azo]naphthalene-2,7-disulphonate