, 4-[[5-[(5-chloro-2-fluoro-6-methyl-4-pyrimidinyl)amino]-2-sulphophenyl]azo]-1-(2,5-disulphophenyl)-4,5-dihydro-5-oxo-1H-pyrazole-3-carboxylic acid, sodium salt
, 4-[[5-[[4-chloro-6-[(4-sulphophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulphophenyl]azo]-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, sodium salt