tetrasodium 5-[[4'-[[8-[[2,4-dihydroxy-3-[(2-methoxy-5-sulphonatophenyl)azo]phenyl]azo]-1-hydroxy-3,6-disulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]salicylate

5-[[4'-[[8-[[2,4-Dihydroxy-3-[(2-methoxy-5-sulfophenyl)azo]phenyl]azo]-1-hydroxy-3,6-disulfo-2-naphtyl]azo]-3,3'-dimethoxy-1,1'-biphenyl-4-yl]azo]-2-hydroxybenzoic acid tetrasodium salt