, 4-hydroxy-7-[[[[5-hydroxy-6-[(2-methoxyphenyl)azo]-7-sulpho-2-naphthyl]amino]carbonyl]amino]-3-[(6-sulpho-2-naphthyl)azo]naphthalene-2-sulphonic acid, sodium salt
, 4-hydroxy-7-[[[[5-hydroxy-6-[(2-methyl-4-sulphophenyl)azo]-7-sulpho-2-naphthyl]amino]carbonyl]amino]-3-(phenylazo)naphthalene-2-sulphonic acid, sodium salt