1-Phenyl-2,4-dimethyl-3-(p-aminobenzolsulfonamido)-3-pyrazolin-5-on [German] Benzenesulfonamide, p-amino-N-(2,4-dimethyl-5-oxo-1-phenyl-3-pyrazolin-3-yl)- DA9501650 p-Amino-N-(2,4-dimethyl-5-oxo-1-phenyl-3-pyrazolin-3-yl)benzenesulfonamide