AM404, also known as N-arachidonoylphenolamine, is an active metabolite of paracetamol, responsible for all or part of its analgesic action and anticonvulsant effects. Chemically, it is the amide formed from 4-aminophenol and arachidonic acid. AM404 is one of the AM cannabinoids discovered by Alexandros Makriyannis and his team. From Wikipedia