A-349,821

A-349,821
Systematic (IUPAC) name

(4'-[3-(2R,5R-dimethylpyrrolidin-1-yl)propoxy]biphenyl-4-yl)morpholin-4-ylmethanone
Clinical data
Identifiers
CAS Registry Number	372513-99-0^N 556835-30-4 (trifluoroacetate salt)
PubChem	CID 9954017
IUPHAR ligand	1217
ChemSpider	8129627^Y
ChEMBL	CHEMBL179702^Y
Chemical data
Formula	C₂₆H₃₄N₂O₃
Molecular mass	422.558
SMILES C[C@@H]1CC[C@H](N1CCCOC2=CC=C(C=C2)C3=CC=C(C=C3)C(=O)N4CCOCC4)C
InChI InChI=1S/C26H34N2O3/c1-20-4-5-21(2)28(20)14-3-17-31-25-12-10-23(11-13-25)22-6-8-24(9-7-22)26(29)27-15-18-30-19-16-27/h6-13,20-21H,3-5,14-19H2,1-2H3/t20-,21-/m1/s1 ^Y Key:CFUHKRLMDNFZED-NHCUHLMSSA-N ^Y
N (what is this?) (verify)

A-349,821 is a potent and selective histamine H₃ receptor antagonist^[1] (or possibly an inverse agonist).^[2] It has nootropic effects in animal studies,^[3] although there do not appear to be any plans for clinical development at present and it is currently only used in laboratory research.

References

↑ Faghih, R; Dwight, W; Pan, JB; Fox, GB; Krueger, KM; Esbenshade, TA; McVey, JM; Marsh, K; Bennani, YL; Hancock, AA (2003). "Synthesis and SAR of aminoalkoxy-biaryl-4-carboxamides: novel and selective histamine H3 receptor antagonists". Bioorganic & Medicinal Chemistry Letters 13 (7): 1325–8. doi:10.1016/S0960-894X(03)00118-5. PMID 12657274.
↑ Witte, DG; Yao, BB; Miller, TR; Carr, TL; Cassar, S; Sharma, R; Faghih, R; Surber, BW; Esbenshade, TA; Hancock, AA; Krueger, KM (2006). "Detection of multiple H3 receptor affinity states utilizing 3HA-349821, a novel, selective, non-imidazole histamine H3 receptor inverse agonist radioligand". British Journal of Pharmacology 148 (5): 657–70. doi:10.1038/sj.bjp.0706752. PMC 1751875. PMID 16715122.
↑ Esbenshade, T. A.; Fox, G. B.; Krueger, K. M.; Baranowski, J. L.; Miller, T. R.; Kang, C. H.; Denny, L. I.; Witte, D. G.; Yao, B. B.; Pan, J. B.; Faghih, R.; Bennani, Y. L.; Williams, M.; Hancock, A. A. (2004). "Pharmacological and behavioral properties of A-349821, a selective and potent human histamine H3 receptor antagonist". Biochemical Pharmacology 68 (5): 933–945. doi:10.1016/j.bcp.2004.05.048. PMID 15294456.

Histaminergics

Receptor
(ligands)

H₁	Agonists: 2-Pyridylethylamine Betahistine Histamine HTMT UR-AK49 Antagonists: First-generation: 4-Methyldiphenhydramine Alimemazine Antazoline Azatadine Bamipine Benzatropine (benztropine) Bepotastine Bromazine Brompheniramine Buclizine Captodiame Carbinoxamine Chlorcyclizine Chloropyramine Chlorothen Chlorphenamine Chlorphenoxamine Cinnarizine Clemastine Clobenzepam Clocinizine Cyclizine Cyproheptadine Dacemazine Decloxizine Deptropine Dexbrompheniramine Dexchlorpheniramine Dimenhydrinate Dimetindene Diphenhydramine Diphenylpyraline Doxylamine Embramine Etodroxizine Etybenzatropine (ethylbenztropine) Etymemazine Flunarizine Histapyrrodine Homochlorcyclizine Hydroxyethylpromethazine Hydroxyzine Isopromethazine Isothipendyl Meclozine Medrylamine Mepyramine (pyrilamine) Mequitazine Methafurylene Methapyrilene Methdilazine Moxastine Orphenadrine Oxatomide Oxomemazine Phenindamine Pheniramine Phenyltoloxamine Pimethixene Piperoxan Pipoxizine Promethazine Propiomazine Pyrrobutamine Talastine Thenalidine Thenyldiamine Thiazinamium Thonzylamine Tolpropamine Tripelennamine Triprolidine Second/third-generation: Acrivastine Alinastine Astemizole Azelastine Bamirastine Barmastine Bepiastine Bepotastine Bilastine Cabastinen Carebastine Cetirizine Clemastine Clemizole Clobenztropine Desloratadine Dorastine Ebastine Efletirizine Emedastine Epinastine Fexofenadine Flezelastine Ketotifen Latrepirdine Levocabastine Levocetirizine Linetastine Loratadine Mapinastine Mebhydrolin Mizolastine Moxastine Noberastine Octastine Olopatadine Perastine Pibaxizine Piclopastine Rocastine Rupatadine Setastine Talastine Temelastine Terfenadine Vapitadine Zepastine Non-generational: Atypical antipsychotics (e.g., aripiprazole, asenapine, clozapine, iloperidone, olanzapine, paliperidone, quetiapine, risperidone, ziprasidone, zotepine) Tetracyclic antidepressants (e.g., amoxapine, loxapine, maprotiline, mianserin, mirtazapine, oxaprotiline) Tricyclic antidepressants (e.g., amitriptyline, butriptyline, clomipramine, desipramine, dosulepin (dothiepin), doxepin, imipramine, iprindole, lofepramine, nortriptyline, protriptyline, trimipramine) Typical antipsychotics (e.g., chlorpromazine, flupenthixol, fluphenazine, loxapine, perphenazine, prochlorperazine, thioridazine, thiothixene) Unknown/unsorted: Belarizine Elbanizine Flotrenizine Napactadine Tagorizine Trelnarizine Trenizine

H₂	Agonists: Amthamine Betazole Dimaprit Histamine HTMT Impromidine UR-AK49 Antagonists: Bisfentidine Burimamide Cimetidine Dalcotidine Donetidine Ebrotidine Etintidine Famotidine Lafutidine Lamtidine Lavoltidine (loxtidine) Lupitidine Metiamide Mifentidine Niperotidine Nizatidine Osutidine Oxmetidine Pibutidine Quisultazine (quisultidine) Ramixotidine Ranitidine Roxatidine Sufotidine Tiotidine Tuvatidine Venritidine Xaltidine

H₃	Agonists: α-Methylhistamine Cipralisant Histamine Imetit Immepip Immethridine Methimepip Proxyfan Antagonists: A-349,821 A-423,579 ABT-239 ABT-652 AZD5213 Betahistine Burimamide Ciproxifan Clobenpropit Conessine GSK-189,254 Impentamine Iodophenpropit Irdabisant JNJ-5207852 MK-0249 NNC 38-1049 PF-03654746 Pitolisant SCH-79687 Thioperamide VUF-5681

H₄	Agonists: 4-Methylhistamine α-Methylhistamine Histamine VUF-8430 Antagonists: JNJ-7777120 JNJ-38518168 Mianserin Thioperamide VUF-6002

Transporter
(inhibitors)

VMATs

TAAR1 inactive	Amiodarone APP AZIK Bietaserpine Deserpidine Dihydrotetrabenazine Efavirenz GBR-12935 GZ-793A Ibogaine Ketanserin Lobeline Methoxytetrabenazine NBI-98854 Reserpine Rose bengal SD-809 Tetrabenazine Vanoxerine (GBR-12909)

TAAR1 active	Amphetamine Methamphetamine MDMA Phenethylamine

Enzyme
(inhibitors)

HDC	Catechin Meciadanol Naringenin Tritoqualine

HNMT	Amodiaquine Diphenhydramine Harmaline Metoprine Quinacrine SKF-91,488 Tacrine

DAO	Aminoguanidine

Others

Precursors	L -Histidine

Cofactors	Vitamin B₆

Index of the respiratory system

Description	Anatomy nose larynx lower thorax Physiology Development

Disease	Congenital Neoplasms and cancer Chest trauma Infection common cold pneumonia tuberculosis Other Symptoms and signs eponymous

Treatment	Procedures mechanical ventilation Drugs nasal throat obstructive airway diseases cough and cold histaminergics pulmonary arterial hypertension other Surgery

A-349,821

See also

References