, 2,7-Naphthalenedisulfonicacid, 5-[[5-chloro-6-methyl-2-(methylsulfonyl)-4-pyrimidinyl]amino]-4-hydroxy-3-(2-phenyldiazenyl)-,sodium salt (1:?), 5-[[5-chloro-6-methyl-2-(methylsulphonyl)-4-pyrimidinyl]amino]-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt
5-[[5-chloro-6-methyl-2-(methylsulphonyl)-4-pyrimidinyl]amino]-4-hydroxy-3-[(2-sulphophenyl)azo]naphthalene-2,7-disulphonic acid, potassium sodium salt