disodium 5-[[4-[[[4-[[2,4-dihydroxy-5-[[2-hydroxy-5-[(3-sulphonatophenyl)azo]phenyl]azo]phenyl]azo]phenyl]amino]carbonyl]phenyl]azo]salicylate

5-[[4-[[[4-[[2,4-Dihydroxy-5-[[2-hydroxy-5-[[3-(sodiosulfo)phenyl]azo]phenyl]azo]phenyl]azo]phenyl]amino]carbonyl]phenyl]azo]-2-hydroxybenzoic acid sodium salt