property is retained, as in dextromethorphan. Chemical derivatives Immediate derivatives of morphinan include: 3-Hydroxymorphinan 3-Methoxymorphinan Butorphanol Cyclorphan Dextrallorphan Dextromethorphan Dextrorphan Dimemorfan Ketorfanol Levallorphan Levofurethylnormorphanol Levomethorphan Levophenacylmorphan Levorphanol Norlevorphanol Racemethorphan Racemorphan Oxilorphan Phenomorphan Proxorphan Xorphanol More distant of derivatives include: Cyprodime Drotebanol Nalbuphine Sinomenine As well as the following: Morphine (and naturally occurring and semi-synthetic analogues) Naloxone Naloxegol Chemical relatives The following structures are related to morphinan: Benzylisoquinoline Hasubanan Hasubanonine References Brunton L L, Blumenthal D K, Murri N, Dandan R H, Knollmann B C. Goodman & Gilman's The Pharmacological Basis of Therapeutics. 12th ed. New York: McGraw-Hill, 2011. . Opioids