Paracetamol Molecule -- Tylenol
Paracetamol is the active ingredient in Tylenol. It consists of a benzene ring core, substituted by one hydroxyl group and the nitrogen atom of an amide group in the para (1,4) pattern. The amide group is acetamide (ethanamide). It is an extensively conjugated system. There are two activating groups that make the benzene ring highly reactive toward electrophilic aromatic substitution.