Substituted morphinans CompoundStructure Substituted morphinans Desomorphine Dextromethorphan (DXM) Levomethorphan (LVM) Levallorphan Hydromorphone Morphine Norcodeine Codeinone Codeine Hydrocodone Dihydrocodeine Thebaine Ethylmorphine Oxycodone 6-Monoacetylmorphine (6-MAM) Naloxone Diacetylmorphine (Heroin) Buprenorphine Codeine-6-glucuronide