p-(4,5-dihydro-4-{3-[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]but-2-enylidene}-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulfonic acid, 4,4'-[3,3'-dimethyl-5,5'-dioxo-2,5,4',5'-tetrahydro-4,4'-(1-methyl-prop-1-en-1-yl-3-ylidene)-bis-pyrazol-1-yl]-bis-benzenesulfonic acid, p-(4,5-Dihydro-4-(3-(5-hydroxy-3-methyl-1-(4-sulphophenyl)-1H-pyrazol-4-yl)but-2-enylidene)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid, EINECS 248-755-7,