Ethylmethylthiambutene

Ethylmethylthiambutene
Clinical data

ATC code	none
Legal status
Legal status	CA: Schedule I DE: Anlage I (Controlled) US: Schedule I
Identifiers
IUPAC name N-ethyl-N-methyl-4,4-dithiophen-2-yl-but-3-en-2-amine
CAS Number	441-61-2
PubChem (CID)	46424
DrugBank	DB01468^Y
ChemSpider	42256^Y
UNII	722BFZ899Q^Y
ECHA InfoCard	100.006.482
Chemical and physical data
Formula	C₁₅H₁₉NS₂
Molar mass	277.45 g/mol
3D model (Jmol)	Interactive image
SMILES CCN(C)C(C)C=C(C1=CC=CS1)C2=CC=CS2
InChI InChI=1S/C15H19NS2/c1-4-16(3)12(2)11-13(14-7-5-9-17-14)15-8-6-10-18-15/h5-12H,4H2,1-3H3^Y Key:MORSAEFGQPDBKM-UHFFFAOYSA-N^Y
(verify)

Ethylmethylthiambutene (N-ethyl-N-methyl-1-methyl-3,3-di-2-thienylallylamine; Emethibutin) is an opioid analgesic drug from the thiambutene family, around 1.3x the potency of morphine.^[1]^[2]^[3] It is under international control under Schedule I of the UN Single Convention On Narcotic Drugs 1961, presumably due to high abuse potential. It is a Schedule I controlled substance in the United States with a DEA ACSCN of 9623 and zero annual manufacturing quota as of 2013.

References

↑ Adamson, DW; Green, AF (1950). "A new series of analgesics". Nature. 165 (4186): 122–122. doi:10.1038/165122a0. PMID 15409854.
↑ Adamson, DW; Duffin, WM; Green, AF (1951). "Dithienylbutylamines as analgesics". Nature. 167 (4239): 153–4. doi:10.1038/167153b0. PMID 14806409.
↑ Green, AF (1953). "Analgesic and other properties of 3: 3-dithienylalkenylamines". British journal of pharmacology and chemotherapy. 8 (1): 2–9. doi:10.1111/j.1476-5381.1953.tb00739.x. PMC 1509239. PMID 13066683.

Analgesics (N02A, N02B)

Opioids

Opiates/opium	Codeine^# (+paracetamol, +aspirin) Morphine^# (+naltrexone) Opium Laudanum Paregoric

Semisynthetic	Acetyldihydrocodeine Benzylmorphine Buprenorphine (+naloxone) Desomorphine Diamorphine (heroin) Dihydrocodeine (+paracetamol) Dihydromorphine Ethylmorphine Hydrocodone (+paracetamol, +ibuprofen, +aspirin) Hydromorphinol Hydromorphone Nicocodeine Nicodicodeine Nicomorphine Oxycodone (+paracetamol, +aspirin, +ibuprofen, +naloxone, +naltrexone) Oxymorphone Thebacon

Synthetic	Alphaprodine Anileridine Butorphanol Dextromoramide Dextropropoxyphene Dezocine Fentanyl (+fluanisone) Ketobemidone Levorphanol Meptazinol Methadone Nalbuphine Pentazocine Pethidine Phenadoxone Phenazocine Piminodine Piritramide Propiram Tapentadol Tilidine Tramadol

Paracetamol-type

Acetanilide^‡
Bucetin^‡
Butacetin^‡
Paracetamol (acetaminophen)^#
Parapropamol^‡
Phenacetin^‡
Propacetamol^‡

NSAIDs

Propionates	Fenoprofen Flurbiprofen Ibuprofen^# Ketoprofen Naproxen Oxaprozin

Oxicams	Meloxicam Piroxicam

Acetates	Diclofenac Indometacin Ketorolac Nabumetone Sulindac Tolmetin

COX-2 inhibitors	Celecoxib Etoricoxib Lumiracoxib Parecoxib Rofecoxib ^‡ Valdecoxib ^‡

Fenamates	Meclofenamic acid Mefenamic acid

Salicylates	Aspirin (acetylsalicylic acid)^# (+paracetamol/caffeine) Benorylate Diflunisal Ethenzamide Magnesium salicylate Salicin Salicylamide Salsalate Wintergreen (methyl salicylate)

Pyrazolones	Aminophenazone^‡ Ampyrone Metamizole (dipyrone) Nifenazone Phenazone Propyphenazone

Others	Glafenine

Cannabinoids

Ion channel
modulators

Calcium blockers	Gabapentin Gabapentin enacarbil Pregabalin Ziconotide

Sodium blockers	Carbamazepine Lacosamide Local anesthetics (e.g., cocaine, lidocaine) Mexiletine Nefopam Tricyclic antidepressants (e.g., amitriptyline^#) Na_v1.7/1.8-selective: DSP-2230^§ Funapide^§ PF-05089771^§ Raxatrigine^§

Potassium openers	Flupirtine

Myorelaxants

Others

Camphor
Capsaicin
Clonidine
Ketamine
Menthol
Methoxyflurane
Nefopam
Proglumide
Tricyclic antidepressants (e.g., amitriptyline^#)

^#WHO-EM
^‡Withdrawn from market
Clinical trials:
- ^†Phase III
- ^§Never to phase III

Opioid receptor modulators

MOR	Agonists (abridged; see here for a full list): 7-Acetoxymitragynine 7-Hydroxymitragynine ψ-Akuammigine α-Chlornaltrexamine α-Narcotine Acetyldihydrocodeine Acetylfentanyl Acrylfentanyl Adrenorphin (metorphamide) AH-7921 Akuammicine Akuammidine Alfentanil Anileridine Apparicine β-Endorphin BAM-12P BAM-18P BAM-22P Benzhydrocodone Benzylmorphine Bezitramide Biphalin BU08070 Buprenorphine Butorphan Butorphanol Butyrfentanyl BW-373U86 Carfentanil Casokefamide Cebranopadol Chloroxymorphamine Codeine DADLE DAMGO (DAGO) Dermorphin Desomorphine Dextromoramide Dextropropoxyphene (propoxyphene) Dezocine Dimenoxadol Dimethylaminopivalophenone Eluxadoline Diamorphine (heroin) Dihydrocodeine Dihydroetorphine Dihydromorphine Diphenoxylate Dipipanone Dynorphin A Embutramide Endomorphin-1 Endomorphin-2 Eseroline Ethylmorphine Etorphine Fentanyl Fluorophen Frakefamide Furanylfentanyl Hemorphin-4 Herkinorin Hodgkinsine Hydrocodone Hydromorphinol Hydromorphone IBNtxA Ketamine Ketobemidone Kratom Laudanosine Lefetamine Leu-enkephalin Levacetylmethadol Levomethorphan Levorphanol Lexanopadol Loperamide Matrine Meptazinol Met-enkephalin (metenkefalin) Methadone Metkefamide Metopon Mitragynine Mitragynine pseudoindoxyl Morphiceptin Morphine Nalbuphine Nalbuphine sebacate NalBzOH Nalmexone Naltalimide Neopine Nicocodeine Nicodicodeine Nicomorphine NKTR-181 Norketamine O-Desmethyltramadol Octreotide Oliceridine OM-3-MNZ Oripavine Oxycodone Oxymorphazone Oxymorphonazine Oxymorphone Oxymorphone phenylhydrazone OxyPNPH Papaver somniferum (opium) Pentazocine Pericine Pethidine (meperidine) Phenazocine Phencyclidine Piminodine Piritramide PL-017 Prodine Propiram PZM21 Racemethorphan Racemorphan Remifentanil Salsolinol SC-17599 Sinomenine Sufentanil Tapentadol Tetrahydropapaveroline TH-030418 Thebaine Thienorphine Tianeptine Tilidine Tramadol Trimebutine TRIMU 5 TRV734 Tubotaiwine U-47700 Valorphin Viminol Xorphanol PAMs: BMS-986121 BMS-986122 Antagonists: (3S,4S)-Picenadol 2-(S)-N,N-(R)-Viminol 4-Caffeoyl-1,5-quinide 4′-Hydroxyflavanone 4',7-Dihydroxyflavone 6β-Naltrexol 6β-Naltrexol-d4 18-MC α-Gliadin β-Chlornaltrexamine β-Funaltrexamine Akuammine Alvimopan AM-251 Apigenin AT-076 Axelopran Bevenopran Catechin Catechin gallate Clocinnamox CTAP CTOP Cyclofoxy Cyprodime Diacetylnalorphine Diprenorphine ECG EGC Epicatechin Eptazocine Gemazocine Ginsenoside R Hyperoside Ibogaine Levallorphan Lobeline LY-255582 LY-2196044 Methocinnamox Methylnaltrexone Methylsamidorphan chloride Naldemedine Nalmefene Nalodeine (N-allylnorcodeine) Nalorphine Nalorphine dinicotinate Naloxazone Naloxegol Naloxol Naloxonazine Naloxone Naltrexazone Naltrexonazine Naltrexone Naltrindole Naringenin Noribogaine Oxilorphan Pawhuskin A Rimonabant Quadazocine Samidorphan Taxifolin Unknown/unsorted: Cannabidiol Coronaridine Cyproterone acetate Dihydroakuuamine Tabernanthine Tetrahydrocannabinol

DOR	Agonists: 6'-GNTI 7-SIOM ADL-5747 (PF-04856881) ADL-5859 Amoxapine AR-M100390 (ARM390) AZD2327 β-Endorphin BAM-18P Biphalin BU-48 Butorphan Butorphanol BW-373U86 Casokefamide Cebranopadol Codeine Cyclazocine DADLE Deltorphin A Deltorphin I Deltorphin II Desmethylclozapine Dezocine Diamorphine (heroin) Dihydroetorphine Dihydromorphine DPDPE DPI-221 DPI-3290 DSLET Ethylketazocine Etorphine Fentanyl FIT Fluorophen Hemorphin-4 Hydrocodone Hydromorphone Ibogaine Isomethadone JNJ-20788560 KNT-127 Kratom Laudanosine Leu-enkephalin Levomethorphan Levorphanol Lexanopadol Lofentanil Met-enkephalin (metenkefalin) Metazocine Metkefamide Mitragynine Mitragynine pseudoindoxyl Morphine N-Phenethyl-14-ethoxymetopon Norbuprenorphine NalBzOH O-Desmethyltramadol Oripavine Oxycodone Oxymorphone Pethidine (meperidine) Proglumide Racemethorphan Racemorphan RWJ-394674 Samidorphan SB-235863 SKF-10047 SNC-80 SNC-162 TAN-67 (SB-205,607) TH-030418 Thebaine Thiobromadol (C-8813) Tianeptine Tonazocine Tramadol TRV250 Xorphanol Zenazocine Antagonists: 4',7-Dihydroxyflavone 5'-NTII 6β-Naltrexol 6β-Naltrexol-d4 α-Santolol β-Chlornaltrexamine Apigenin AT-076 Axelopran Bevenopran BNTX Catechin Catechin gallate Clocinnamox Diacetylnalorphine Diprenorphine ECG EGC Eluxadoline Epicatechin ICI-154129 ICI-174864 LY-255582 LY-2196044 Methylnaltrexone Methylnaltrindole N-Benzylnaltrindole Nalmefene Nalorphine Naltrexone Naltriben Naltrindole Naloxone Naringenin Noribogaine Pawhuskin A Quadazocine SDM25N SoRI-9409 Taxifolin Thienorphine Unknown/unsorted: 18-MC Cannabidiol Coronaridine Cyproterone acetate Tabernanthine Tetrahydrocannabinol

KOR	Agonists: 6'-GNTI 8-CAC 18-MC 14-Methoxymetopon β-Chlornaltrexamine β-Funaltrexamine Adrenorphin (metorphamide) Akuuamicine Alazocine Allomatrine Asimadoline BAM-12P BAM-18P BAM-22P Big dynorphin Bremazocine BRL-52537 Butorphan Butorphanol BW-373U86 Cebranopadol Ciprefadol CR665 Cyclazocine Cyclorphan Cyprenorphine Diamorphine (heroin) Diacetylnalorphine Difelikefalin Dihydroetorphine Dihydromorphine Diprenorphine Dynorphin A Dynorphin B (rimorphin) Eluxadoline Enadoline Eptazocine Erinacine E Ethylketazocine Etorphine Fedotozine Fentanyl Gemazocine GR-89696 GR-103545 Hemorphin-4 Herkinorin HS665 Hydromorphone HZ-2 Ibogaine ICI-199,441 ICI-204,448 Ketamine Ketazocine Laudanosine Leumorphin (dynorphin B-29) Levallorphan Levomethorphan Levorphanol Lexanopadol Lofentanil LPK-26 Lufuradom Matrine MB-1C-OH Menthol Metazocine Metkefamide Mianserin Mirtazapine Morphine Moxazocine MR-2034 N-MPPP Nalbuphine Nalbuphine sebacate NalBzOH Nalfurafine Nalmefene Nalodeine (N-allylnorcodeine) Nalorphine Naltriben Niravoline Norbuprenorphine Norbuprenorphine-3-glucuronide Noribogaine Norketamine O-Desmethyltramadol Oripavine Oxilorphan Oxycodone Pentazocine Pethidine (meperidine) Phenazocine Proxorphan Racemethorphan Racemorphan RB-64 Salvinorin A (salvia) Salvinorin B ethoxymethyl ether Salvinorin B methoxymethyl ether Samidorphan SKF-10047 Spiradoline (U-62,066) TH-030418 Thienorphine Tifluadom Tricyclic antidepressants (e.g., amitriptyline, desipramine, imipramine, nortriptyline) U-50,488 U-54,494A U-69,593 Xorphanol Antagonists: 4′-Hydroxyflavanone 4',7-Dihydroxyflavone 5'-GNTI 6'-GNTI 6β-Naltrexol 6β-Naltrexol-d4 β-Chlornaltrexamine Buprenorphine/samidorphan Amentoflavone ANTI Apigenin Arodyne AT-076 Axelopran AZ-MTAB Binaltorphimine BU09059 Buprenorphine Catechin Catechin gallate CERC-501 (LY-2456302) Clocinnamox Cyclofoxy Dezocine DIPPA EGC ECG Epicatechin Hyperoside JDTic LY-255582 LY-2196044 LY-2444296 LY-2459989 LY-2795050 MeJDTic Methylnaltrexone ML190 ML350 MR-2266 N-Fluoropropyl-JDTic Naloxone Naltrexone Naltrindole Naringenin Norbinaltorphimine Noribogaine Pawhuskin A PF-4455242 RB-64 Quadazocine Taxifolin UPHIT Zyklophin Unknown/unsorted: Akuammicine Akuammine Coronaridine Cyproterone acetate Dihydroakuuamine Ibogamine Tabernanthine

NOP	Agonists: (Arg14,Lys15)Nociceptin ((pF)Phe⁴)Nociceptin(1-13)NH₂ (Phe¹Ψ(CH₂-NH)Gly²)Nociceptin(1-13)NH₂ Ac-RYYRWK-NH₂ Ac-RYYRIK-NH₂ BU08070 Buprenorphine Cebranopadol Dihydroetorphine Etorphine JNJ-19385899 Levomethorphan Levorphanol Levorphanol Lexanopadol MCOPPB MT-7716 NNC 63-0532 Nociceptin (orphanin FQ) Nociceptin (1-11) Nociceptin (1-13)NH₂ Norbuprenorphine Racemethorphan Racemorphan Ro64-6198 Ro65-6570 SCH-221510 SCH-486757 SR-8993 SR-16435 TH-030418 Antagonists: (Nphe¹)Nociceptin(1-13)NH₂ AT-076 BAN-ORL-24 J-113397 JTC-801 LY-2940094 NalBzOH Nociceptin (1-7) Nocistatin SB-612111 SR-16430 Thienorphine Trap-101 UFP-101

Unsorted	β-Casomorphins Amidorphin BAM-20P Cytochrophin-4 Deprolorphin Gliadorphin (gluteomorphin) Gluten exorphins Hemorphins Kava constituents MEAGL MEAP NEM Neoendorphins Nepetalactone (catnip) Peptide B Peptide E Peptide F Peptide I Rubiscolins Soymorphins

Others	Enkephalinase inhibitors: Amastatin BL-2401 Candoxatril D -Phenylalanine Dexecadotril (retorphan) Ecadotril (sinorphan) Kelatorphan Racecadotril (acetorphan) RB-101 RB-120 RB-3007 Opiorphan Selank Semax Spinorphin Thiorphan Tynorphin Ubenimex (bestatin) Propeptides: β-Lipotropin (proendorphin) Prodynorphin Proenkephalin Pronociceptin Proopiomelanocortin (POMC) Others: Kyotorphin (met-enkephalin releaser/degradation stabilizer)

See also: Peptide receptor modulators

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