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A process for the preparation of acid - 1 - methyl - 2 3 5 6 tetraido - 5 - semi carbazida - 6 - hidroxiindol - 3 - sulfonico and their alkali salts post core units
A process for the preparation of acid - 1 - methyl - 2 3 5 6 tetraido - 5 - semi carbazida - 6 - hidroxiindol - 3 - sulfonico and their alkali salts post core units