BU-48

BU-48
Identifiers

IUPAC name N-Cyclopropylmethyl-[7α,8α,2',3']-cyclohexano-1'[S]-hydroxy-6,14-endo-ethenotetrahydronororipavine
PubChem (CID)	10003114
ChemSpider	58178410
Chemical and physical data
Formula	C₂₇H₃₃NO₄
Molar mass	435.554 g/mol
3D model (Jmol)	Interactive image
SMILES CO[C@]12C=C[C@@]3([C@H]4[C@@H]1[C@H](CCC4)O)[C@H]5Cc6ccc(c7c6[C@]3([C@H]2O7)CCN5CC8CC8)O
InChI InChI=1S/C27H33NO4/c1-31-27-10-9-25(17-3-2-4-18(29)22(17)27)20-13-16-7-8-19(30)23-21(16)26(25,24(27)32-23)11-12-28(20)14-15-5-6-15/h7-10,15,17-18,20,22,24,29-30H,2-6,11-14H2,1H3/t17-,18+,20-,22-,24-,25-,26+,27-/m1/s1 Key:LMFRYUPWVALVRA-QDFTYCMYSA-N
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BU-48 is a drug that is used in scientific research. It is from the oripavine family, related to better-known drugs such as etorphine and buprenorphine.

The parent compound from which BU-48 was derived (with N-methyl rather than methylcyclopropyl on the nitrogen and lacking the aliphatic hydroxyl group) is a powerful μ-opioid agonist 1000x more potent than morphine,^[1] but in contrast BU-48 has only weak analgesic effects and instead acts primarily as a δ-opioid agonist. Its main effects are to produce convulsions,^[2] but it may also have antidepressant effects.^[3]

References

↑ Lewis JW, Bentley KW, Cowan A. Narcotic Analgesics and Antagonists. Annual Reviews in Pharmacology 1971;11:241-270.
↑ Broom DC, Guo L, Coop A, Husbands S, Lewis JW, Woods JH, Traynor JR. BU48: A novel buprenorphine analogue that exhibits delta-opioid mediated convulsions but not delta-opioid-mediated antinociception in mice. Journal of Pharmacology and Experimental Therapeutics 2000 Sep; 294(3): 1195–1200. PMID 10945877
↑ Broom DC, Jutkiewicz EM, Rice KC, Traynor JR, Woods JH. Behavioral effects of delta-opioid receptor agonists: potential antidepressants? Japanese Journal of Pharmacology. 2002 Sep;90(1):1-6. doi:10.1254/jjp.90.1 PMID 12396021

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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