Metopon: Information from Answers.com


Metopon
Systematic (IUPAC) name
5β-methyl-7,8-dihydromorphin-6-one
Identifiers
CAS number	143-52-2
ATC code	none
PubChem	5359353
Chemical data
Formula	C₁₈H₂₁N O₃
Mol. mass	299.364 g/mol
Pharmacokinetic data
Bioavailability	?
Metabolism	?
Half life	?
Excretion	?
Therapeutic considerations
Pregnancy cat.	?
Legal status
Routes	?

Metopon (5-methylhydromorphone hydrochloride) is an opiate analogue that is a methylated derivative of hydromorphone which was invented in 1948 as an analgesic.^[1]

Metopon is sometimes used in medicine, but although longer acting than hydromorphone, metopon is less potent and its oral bioavailability, while higher than that of morphine, is still fairly low, so generally metopon has few advantages to distinguish it from other, more commonly used opioid analgesics,^[2] although it does have a slightly lower tendency to produce nausea and respiratory depression compared to morphine.^[3]

CAS number 124-92-5 (Metopon hydrochloride)

References

^ Eddy NB. Pharmacology of Metopon and other new analgesic opium derivatives. Annals of the New York Academy of Sciences. 1948; 51(1):51–58.
^ McLaughlin JP, Nowak D, Sebastian A, Schultz AG, Archer S, Bidlack JM. Metopon and two unique derivatives: affinity and selectivity for the multiple opioid receptors. European Journal of Pharmacology. 1995 Dec 27;294(1):201-6.
^ Daniel Lednicer. Central Analgetics. (1982), p145. ISBN 0-471-08314-3

Opioids (N02A)

Opium
derivatives

Whole Opium
Preparations

Compote/Kompot/Polish Heroin • Diascordium • B & O Supprettes • Dover's powder • Laudanum • Mithridate • Opium • Paregoric • Concentrate of Poppy Straw (CPS) • Poppy tea • Smoking Opium • Theriac

Natural Opiates

Opium Alkaloids see also: Components of Opium	Codeine • Morphine • Oripavine • Pseudomorphine • Thebaine

Alkaloid Salts Mixtures	Pantopon • Papaveretum (Omnopon) • Tetrapon

Semisynthetics

Morphine Family	14-Hydroxymorphine • 14β-Hydroxymorphine • 14β-Hydroxymorphone • 2,4-Dinitrophenylmorphine • 6-Methyldihydromorphine • 6-Methylenedihydrodesoxymorphine • 6-Acetyldihydromorphine/6-Monoacetyldihydromorphine • Acetyldihydromorphine • Azidomorphine • Chlornaltrexamine • Chloromorphide • Dihydrodesoxymorphine (Desomorphine) • Dihydromorphine • Ethyldihydromorphine • Hydromorphinol • Methyldesorphine • N-Phenethylnormorphine • Pseudomorphine

3,6 Diesters of Morphine	Diacetyldihydromorphine (Dihydroheroin) • Dibenzoylmorphine • Dibutanoylmorphine • Dipropanoylmorphine • Disalicyloylmorphine • Heroin (Diacetylmorphine) • Heroin-7,8-Oxide • Nicomorphine

Codeine-Dionine Family	14-Hydroxydihydrocodeine • Acetylcodeine • Benzylmorphine • Codeine methylbromide • Desocodeine • Methyldihydromorphine (Dihydroheterocodeine) • Ethylmorphine (Dionine) • Heterocodeine • Isocodeine • Morpholinylethylmorphine (Pholcodine) • Myrophine • Nalodeine • Transisocodeine

Morphinones	14-Ethoxymetopon • 14-Methoxymetopon • 14β-Hydroxymorphone • 14-O-Methyloxymorphone • 14-phenylpropoxy-5-methyl-hydromorphone • 14-Phenylpropoxymetopon • 7-Spiroindanyloxymorphone • 8,14-Dihydroxydihydromorphinone • Acetylmorphone • Ethyldihydromorphinone • Hydromorphinone • Hydromorphone • Hydroxycodeine • Methyldihydromorphinone • Metopon • Morphinol • Morphinone • N-Phenethyl-14-ethoxymetopon • Oxymorphol • Oxymorphone • Pentamorphone • Semorphone

Codeinones	1-carboxy-14-hydroxydihydrocodeinone • 1-carbethoxy-14-hydroxydihydrocodeinone • Thebacon (Acetyldihydrocodeinone / Dihydrocodeinone enol acetate) • Codeinone • Codorphone • Codoxime • Hydrocodone • Monodihydrocodeineone • Oxycodone

Dihydrocodeine Series	14-hydroxydihydrocodeine • Acetyldihydrocodeine • Dihydrocodeine • Dihydrodesoxycodeine/Desocodeine • Dihydroisocodeine • Nicocodeine • Nicodicodeine

Nitrogen Morphine Derivatives	Codeine-N-Oxide • Heroin-N-Oxide • Hydromorphone-N-Oxide • Morphine-N-Oxide

Hydrazones	Hydromorphazone • Morphazone • Oxymorphazone

Others	α-chlorocodide • Pholcodine

Active Opiate
Metabolites

Codeine-N-Oxide (Genocodeine) • Hydromorphone-N-Oxide • Heroin-7,8-Oxide • Morphine-3-glucuronide • Morphine-6-glucuronide • Monoacetylmorphine • Morphine-N-Oxide (Genomorphine) • Naltrexol • Norcodeine • Normorphine

Morphinans

Morphinan Series	4-chlorophenylpyridomorphinan • Cyclorphan • Dextro-3-hydroxy-N-allylmorphinan • Dimemorfan • Levargorphan • Levallorphan • Levorphanol • Levorphan • Levophenacylmorphan • Levomethorphan • Norlevorphanol • N-Methylmorphinan • Oxilorphan • Phenomorphan • Methorphan / Racemethorphan • Morphanol / Racemorphanol • Ro4-1539 • Stephodeline • Xorphanol

Others	1-Nitroaknadinine • 14-episinomenine • 5,6-Dihydronorsalutaridine • 6-Ketonalbuphine • Aknadinine • Butorphanol • Cephakicine • Cephasamine • Cyprodime • Drotebanol • Fenfangjine G • Nalbuphine • Sinococuline • Sinomenine (Cocculine) • Tannagine

Benzomorphans

5,9-DEHB • Alazocine • Anazocine • Bremazocine • Cogazocine • Cyclazocine • Dezocine • Eptazocine • Etazocine • Ethylketocyclazocine • Fluorophen • Ketazocine • Metazocine • Pentazocine • Phenazocine • Quadazocine • Thiazocine • Tonazocine • Volazocine • Zenazocine

4-Phenylpiperidines

Pethidines (Meperidines)	Allylnorpethidine • Anileridine • Benzethidine • Carperidine • Difenoxin • Diphenoxylate • Etoxeridine (Carbetidine) • Furethidine • Hydroxypethidine (Bemidone) • Hydroxymethoxypethidine • Morpheridine • Oxpheneridine (Carbamethidine) • Meperidine-N-Oxide • Pethidine (Meperidine) • Pethidine Intermediate A • Pethidine Intermediate B (Norpethidine) • Pethidine Intermediate C (Pethidinic Acid) • Pheneridine • Phenoperidine • Piminodine • Properidine (Ipropethidine) • Sameridine

Prodines	Allylprodine • Isopromedol • Meprodine (α-meprodine / β-meprodine) • MPPP (Desmethylprodine) • PEPAP • Prodine (α-prodine / β-prodine) • Prosidol • Trimeperidine (Promedol)

Ketobemidones	Acetoxyketobemidone • Droxypropine • Ketobemidone • Methylketobemidone • Propylketobemidone

Others	Alvimopan • Loperamide • Picenadol

Open Chain
Opioids

Amidones	Dextromethadone • Dextroisomethadone • Dipipanone • Hexalgon (Norpipanone) • Isomethadone • Levoisomethadone • Levomethadone • Methadone • Methadone intermediate • Normethadone • Norpipanone • Phenadoxone (Heptazone) • Pipidone

Methadols	Dimepheptanol (Racemethadol) • Levacetylmethadol • Levomethadyl acetate (Acetylmethadol) • Noracetylmethadol

Moramides	Dextromoramide • Levomoramide • Moramide intermediate • Racemoramide

Thiambutenes	Diethylthiambutene • Dimethylthiambutene • Ethylmethylthiambutene • Piperidylthiambutene • Pyrrolidinylthiambutene • Thiambutene • Tipepidine

Phenalkoxams	Dextropropoxyphene (Propoxyphene) • Dimenoxadol • Dioxaphetyl Butyrate • Levopropoxyphene • Norpropoxyphene

Ampromides	Diampromide • Phenampromide • Propiram

Others	Fencamfamine • IC-26 • Isoaminile • Lefetamine • R-4066

Anilidopiperidines

3-Allylfentanyl • 3-Methylfentanyl • 3-Methylthiofentanyl • Alfentanil • α-methylacetylfentanyl • α-methylfentanyl • α-methylthiofentanyl • Benzylfentanyl • β-hydroxyfentanyl • β-hydroxythiofentanyl • β-methylfentanyl • Brifentanil • Carfentanil • Fentanyl • Lofentanil • Mirfentanil • Ocfentanil • Ohmefentanyl • Parafluorofentanyl • Phenaridine • Remifentanil • Sufentanil • Thenylfentanyl • Thiofentanyl • Trefentanil

Oripavine
derivatives

6,14-Endoethenotetrahydrooripavine • 7-PET • Acetorphine • Alletorphine • BU-48 • Buprenorphine • Butorphine • Cyprenorphine • Dihydroetorphine • Diprenorphine (M5050) • Etorphine • 18,19-Dehydrobuprenorphine (HS-599) • N-cyclopropylmethyl-noretorphine • Nepenthone • Norbuprenorphine • Thevinone • Thienorphine

Phenazepines

Ethoheptazine • Meptazinol • Metheptazine • Metethoheptazine • Proheptazine

Pirinitramides

Bezitramide • Piritramide

Benzimidazoles

Clonitazene • Etonitazene • Nitazene

Indoles

18-MC • 7-Acetoxymitragynine • 7-Hydroxymitragynine • Akuammidine • Akuammine • Eseroline • Hodgkinsine • Ibogaine • Mitragynine • Noribogaine • Pericine • ψ-Akuammigine

Diphenylmethylpiperazines

BW373U86 • DPI-221 • DPI-287 • DPI-3290 • SNC-80

Opioid peptides
see also: The Opioid Peptides

Casomorphin • DADLE • DALDA • DAMGO • Dermenkephalin • Dermorphin • Deltorphin • DPDPE • Dynorphin • Endomorphin • Endorphin • Enkephalin • Gliadorphin • Morphiceptin • Nociceptin • Octreotide • Opiorphin • Rubiscolin • TRIMU 5

Others

Azaprocin • BDPC • Bisnortilidine • BRL-52537 • C-8813 • Ciramadol • Enadoline • Faxeladol • Herkinorin • J-113,397 • JTC-801 • Methopholine • NNC 63-0532 • Nortilidine • O-Desmethyltramadol • Phenadone • Prodilidine • Profadol • Ro64-6198 • Salvinorin A • SB-612,111 • SC-17599 • RWJ-394,674 • TAN-67 • Tapentadol • Tecodine • Tifluadom • Tilidine • Tramadol • Viminol • W-18 •

Opioid Antagonists
&
Inverse-Agonists

5'-Guanidinonaltrindole • β-Funaltrexamine • 6β-Naltrexol • Alvimopan • Amiphenazole • Binaltorphimine • Chlornaltrexamine • Clocinnamox • Cyclazocine • Cyprodime • Diprenorphine (M5050) • Fedotozine • JDTic • Levallorphan • Methocinnamox • Methylnaltrexone • Nalfurafine • Nalmefene • Nalmexone • Naloxazone • Naloxonazine • Naloxone • Naloxone benzoylhydrazone • Nalorphine • Naltrexone • Naltriben • Naltrindole • Norbinaltorphimine • Oxilorphan • S-allyl-3-hydroxy-17-thioniamorphinan (SAHTM)

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