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C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
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FR1187090D1957-10-221957-10-22
New method of preparation of benzoic orthosulfonic anhydride
ExpiredFR1187090A
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