From a sketch of the structural formula for salicylic acid and acetic anhydride, write the synthesis for the product acetyl salicylic acid, which is aspirin. Discuss how when the product decomposes with moisture, acetic acid is released, which is vinegar. Determine that the smell of vinegar when a bottle of aspirin is opened indicates that the aspirin is decomposing and not up to strength. Draw the structural formula for N-acetyl para amino acid, which is acetaminophen (Tylenol). Note the structural likeness and discuss why both are analgesics. Introduce amides , their general formula and resonance atoms.