Analogues<unk>  has a number of analogues including niconalorphine (the nicomorphine analogue), diacetylnalorphine (heroin analogue), dihydronalorphine (dihydromorphine), and a number of others as well as a number of codeine-based analogues. Synthesis<unk>  synthesis: amended procedure: More recently, it has become much more commonplace to use ethyl chloroformate instead of cyanogen bromide for the Von Braun degradation demethylation step. See for example the list of phenyltropanes or the synthesis of paroxetine for further examples of this.
Nalorphine
Morphine
Fentanyl
Codeine
Naloxone
Betamethadol
Alfentanil
Esketamine