Benzenesulfonicacid,p-[3-methyl-4-[[3-methyl-5-oxo-1-(p-sulfophenyl)-2-pyrazolin-4-ylidene]methyl]-5-oxo-2-pyrazolin-1-yl]-(8CI); Bis[5-methyl-2-p-sulfophenyl-3-pyrazolone-(4)]methineoxonol
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