Trisodium 4-hydroxy-3-((4'-((1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl)azo)-3, 3'-dimethoxy(1, 1'-biphenyl)-4-yl)azo)naphthalene-1, 5-disulphonate

Trisodium 4-hydroxy-3-((4-((2-hydroxy-7-sulphonato-1-naphthyl)azo)-2, 5-dimethoxyphenyl)azo)-8-((4-sulphonatobenzoyl)amino)naphthalene-2-sulphonate

Trisodium 4-hydroxy-3-((4-methoxy-2-sulphonatophenyl)azo)-6-(methyl((2-(sulphonatooxy)ethyl)sulphonyl)amino)naphthalene-2-sulphonate

Trisodium 4-hydroxy-5-((1-oxo-3-(phenylsulphonyl)propyl)amino)-3-((4-((1-oxo-3-(phenylsulphonyl)propyl)amino)-2-sulphonatophenyl)azo)naphthalene-2, 7-disulphonate

Trisodium 4-hydroxy-5-((5-sulphonato-4-((p-tolyl)amino)naphthyl)azo)naphthalene-2, 7-disulphonate

Trisodium 5, 7-bis(carboxylatomethoxy)-4-oxo-3-phenyl-4H-1-benzopyran-2-carboxylate

Trisodium 5, 8-bis((2, 6-diethyl-4-methyl-3-sulphonatophenyl)amino)-9, 10-dihydro-1, 4-dihydroxy-9, 10-dioxoanthracene-2-sulphonate

Trisodium 5, 8-bis((4-(1, 1-dimethylethyl)-2-sulphonatophenyl)amino)-9, 10-dihydro-1, 4-dihydroxy-9, 10-dioxoanthracene-2-sulphonate

Trisodium 5-(((6-((2-chloroethyl)sulphonyl)bicyclo(2.2.1)hept-2-yl)carbonyl)amino)-4-hydroxy-3-((1-sulphonato-2-naphthyl)azo)naphthalene-2, 7-disulphonate

Trisodium 5-((2, 4-dihydroxy-5-((4-((4-nitro-2-sulphonatophenyl)amino)phenyl)azo)phenyl)azo)-4-hydroxy-3-((4-methoxyphenyl)azo)naphthalene-2, 7-disulphonate

Trisodium 5-((2, 4-dihydroxy-5-((4-(phenylamino)-3-sulphonatophenyl)azo)phenyl)azo)-4-hydroxy-3-((4-nitrophenyl)azo)naphthalene-2, 7-disulphonate

Trisodium 5-((2, 6-dihydroxy-3-((4-nitrophenyl)azo)-5-((4-sulphonato-1-naphthyl)azo)phenyl)azo)-4-hydroxy-3-((4-nitrophenyl)azo)naphthalene-2, 7-disulphonate

Trisodium 5-((2-((2-amino-8-hydroxy-6-sulphonato-1-naphthyl)azo)-4-sulphonatophenyl)sulphonyl)salicylate

Trisodium 5-((2-(4, 5-dihydro-3-methyl-5-oxo-4-((2-sulphonatophenyl)azo)-1H-pyrazol-1-yl)-4-sulphonatophenyl)sulphonyl)salicylate

Trisodium 5-((2-amino-4-((4-(2-(4-nitro-2-sulphonatophenyl)vinyl)-3-sulphonatophenyl)azo)phenyl)azo)naphthalene-1-sulphonate

Trisodium 5-((2-amino-4-((4-(2-(4-nitro-2-sulphonatophenyl)vinyl)-3-sulphonatophenyl)azoxy)phenyl)azo)naphthalene-1-sulphonate

Trisodium 5-((2-amino-5-methyl-4-((4-(2-(4-nitro-2-sulphonatophenyl)vinyl)-3-sulphonatophenyl)azoxy)phenyl)azo)naphthalene-1-sulphonate

Trisodium 5-((2-methoxy-5-methyl-4-((4-sulphonatophenyl)azo)phenyl)-N, N, O-azoxy)-2-(2-(4-nitro-2-sulphonatophenyl)vinyl)benzenesulphonate

Trisodium 5-((2-methoxy-5-methyl-4-((4-sulphonatophenyl)azo)phenyl)-N, N, O-azoxy)-2-(2-(4-nitro-2-sulphonatophenyl)vinyl)benzenesulphonate

Trisodium 5-((3-carboxylato-5-methyl-4-oxo-2, 5-cyclohexadien-1-ylidene)(2, 6-dichloro-3(or 4)-sulphonatophenyl)methyl)-3-methylsalicylate