ANALYSIS METHOD OF 3-METHYL-1-PHENYL-2-PYRAZOLIN-5-ONE BULK DRUG, TREATMENT FOR AMYOTROPHIC LATERAL SCLEROSIS, INHIBITION OF PROGRESSION OF AMYOTROPHIC LATERAL SCLEROSIS, AND METHOD OF PRODUCING DRUG CONTAINING 3-METHYL-1-PHENYL-2-PYRAZOLIN-5-ONE BULK DRUG
This method for analyzing the phenylhydrazine content in a 3-methyl-1-phenyl-2-pyrazolin-5-one bulk drug involves: obtaining a first measured value by measuring the phenylhydrazine content of a standard solution that contains phenylhydrazine or a salt thereof, first acidic water and a first water-so...
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