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Kappa agonists, Opioid receptor ligands, Drugs acting on the nervous system, Opioid antagonists

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Analgesics (6)
Opioids (6)
Psychoactive drugs (6)
Dissociative drugs (3)
Pharmaceuticals (3)
Semisynthetic opioids (3)
Alcohols (2)
Synthetic opioids (2)
Alkenes (1)
Allyl compounds (1)
Analgesic (1)
Cyclic compounds (1)
Cycloalkenes (1)
Cyclohexenes (1)
Ethers (1)
Euphoriants (1)
Mu-opioid agonists (1)
Six-membered rings (1)

Nalorphine (62-67-9)  
Allylnormorphine  ·  Nalorphine Hydrochloride  ·  Lethidrone
Nalorphine (INN) (brand names Lethidrone, Nalline), also known as N-allylnormorphine, is a mixed opioid agonist–antagonist with opioid antagonist and analgesic properties. It was introduced in 1954 and was used as an antidote to reverse opioid overdose and in a challenge test to determine opioid dependence. It acts at two opioid receptors — the μ-opioid receptor (MOR) where it has antagonistic effects, and at the κ-opioid receptor (KOR) (Ki = 1.6 nM; EC50 = 483 nM; Emax = 95%) where it exerts high-efficacy partial agonist/near-full agonist characteristics.
levallorphan (152-02-3)  
Lorfan  ·  Naloxiphan
Levallorphan (INN, BAN) (brand names Lorfan, Naloxifan, Naloxiphan), also known as levallorphan tartrate (USAN), is an opioid modulator of the morphinan family used as an opioid analgesic and opioid antagonist/antidote. It acts as an antagonist of the μ-opioid receptor (MOR) and as an agonist of the κ-opioid receptor (KOR), and as a result, blocks the effects of stronger agents with greater intrinsic activity such as morphine whilst simultaneously producing analgesia. Levallorphan was formerly widely used in general anesthesia, mainly to reverse the respiratory depression produced by opioid analgesics and barbiturates used for induction of surgical anaesthesia whilst maintaining a degree of analgesia (via KOR agonism).
Diprenorphine (14357-78-9)  
Revivon  ·  Diprenorphine Hydrochloride
Diprenorphine (brand name Revivon; former developmental code name M5050), also known as diprenorfin, is a non-selective, high-affinity, weak partial agonist of the μ- (MOR), κ- (KOR), and δ-opioid receptor (DOR) (with equal affinity) that is employed in veterinary medicine as an opioid antagonist. It is used to reverse the effects of super-potent opioid analgesics such as etorphine and carfentanil that are used for tranquilizing large animals. The drug is not approved for use in humans.
Oxilorphan (42281-59-4)  
oxilorphan hydrochloride, (9alpha,13alpha,14alpha)-isomer  ·  oxilorphan, (14alpha)-(+-)-isomer  ·  L-N-cyclopropylmethyl-3,14-dihydroxymorphinan
Oxilorphan (INN, USAN) (developmental code name L-BC-2605) is an opioid antagonist of the morphinan family that was never marketed. It acts as a μ-opioid receptor (MOR) antagonist but a κ-opioid receptor (KOR) partial agonist, and has similar effects to naloxone and around the same potency as an MOR antagonist. Oxilorphan has some weak partial agonist actions at the MOR (with miosis, nausea, dizziness, and some euphoria observed) and can produce hallucinogenic/dissociative effects at sufficient doses, indicative of KOR activation.
56195-50-7 (56195-50-7)  
nalodeine  ·  N-allylnorcodeine  ·  nalodeine hydrobromide, (5alpha,6alpha)-isomer
Nalodeine, also known more commonly as N-allylnorcodeine, is an opioid antagonist (specifically, an antagonist of the μ-opioid receptor) that was never marketed but is of notability in having been the first opioid antagonist to have been discovered. It was first reported in 1915, and this was followed by the clinical introduction of nalorphine (N-allylnormorphine) in 1954, naloxone (N-allyloxymorphone) in 1960, and naltrexone (N-methylcyclopropyloxymorphone) in 1963. Nalmefene (6-desoxy-6-methylene-naltrexone), another structurally related opioid antagonist derivative, was also subsequently introduced, in 1996.
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Kappa agonists
Opioid receptor ligands
Drugs acting on the nervous system
Opioid antagonists