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p-[4,5-dihydro-3-methyl-4-[[4-methyl-3-[(phenylamino)sulphonyl]phenyl]azo]-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid  Structure

p-[4,5-dihydro-3-methyl-4-[[4-methyl-3-[(phenylamino)sulphonyl]phenyl]azo]-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid