1. Acetaminophen is licensed under what trademarked name brand in the United States? 2. Explain the chemoselectivity in the reaction of acetic anhydride with p-aminophenol. 3. Draw the structure of salicylic acid. 4. Aspirin can also be produced by an identical acylation reaction of salicylic acid to the one used in today's experiment to produce acetaminophen. Show the reaction of salicylic acid with acetic anhydride and the product of the acylation aspirin. 5. How do you account for the fact that old bottles of aspirin often smell like vinegar, but old bottles of acetaminophen do not