m-Toluenesulfonicacid, 4-(3-methyl-5-oxo-2-pyrazolin-1-yl)- (6CI,7CI,8CI); 1-(2-Methyl-4-sulfophenyl)-3-methyl-5-pyrazolone;3-Methyl-1-(2-methyl-4-sulfophenyl)-5-pyrazolone;3-Methyl-4-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid;4-(3-Methyl-5-oxo-2-pyrazolin-1-yl)-m-toluenesulfonic acid;4-(3-Methyl-5-pyrazolone)-m-toluenesulfonic acid
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