A-349,821

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A-349,821
Systematic (IUPAC) name
260px
(4'-[3-(2R,5R-dimethylpyrrolidin-1-yl)propoxy]biphenyl-4-yl)morpholin-4-ylmethanone
Identifiers
PubChem	CID 9954017
IUPHAR/BPS	1217
Chemical data
Formula	C₂₆H₃₄N₂O₃
Molar mass	422.558[[Script error: No such module "String".]]
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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. Synthesis and SAR of aminoalkoxy-biaryl-4-carboxamides: novel and selective histamine H3 receptor antagonists. Bioorganic and Medicinal Chemistry Letters. 2003 Apr 7;13(7):1325-8. PMID 12657274
↑ Witte DG, Yao BB, Miller TR, Carr TL, Cassar S, Sharma R, Faghih R, Surber BW, Esbenshade TA, Hancock AA, Krueger KM. Detection of multiple H3 receptor affinity states utilizing [3H]A-349821, a novel, selective, non-imidazole histamine H3 receptor inverse agonist radioligand. British Journal of Pharmacology. 2006 Jul;148(5):657-70. PMID 16715122
↑ Esbenshade TA, Fox GB, Krueger KM, Baranowski JL, Miller TR, Kang CH, Denny LI, Witte DG, Yao BB, Pan JB, Faghih R, Bennani YL, Williams M, Hancock AA. Pharmacological and behavioral properties of A-349821, a selective and potent human histamine H3 receptor antagonist. Biochemical Pharmacology. 2004 Sep 1;68(5):933-45. PMID 15294456

Histaminergics

Receptor
ligands

H₁	Agonists: 2-Pyridylethylamine • Betahistine • Histamine • HTMT • UR-AK49 Antagonists: 1st generation: 4-Methyldiphenhydramine • Alimemazine • Antazoline • Azatadine • Bamipine • Benzatropine (Benztropine) • Bepotastine • Bromazine • Brompheniramine • Buclizine • Captodiame • Carbinoxamine • Chlorcyclizine • Chloropyramine • Chlorothen • Chlorpheniramine • Chlorphenoxamine • Cinnarizine • Clemastine • Clobenzepam • Clocinizine • Cyclizine • Cyproheptadine • Dacemazine • Deptropine • Dexbrompheniramine • Dexchlorpheniramine • Dimenhydrinate • Dimetindene • Diphenhydramine • Diphenylpyraline • Doxylamine • Embramine • Etybenzatropine (Ethylbenztropine) • Etymemazine • Histapyrrodine • Homochlorcyclizine • Hydroxyethylpromethazine • Hydroxyzine • Isopromethazine • Isothipendyl • Meclozine • Mepyramine (Pyrilamine) • Mequitazine • Methafurylene • Methapyrilene • Methdilazine • Moxastine • Niaprazine • Orphenadrine • Oxatomide • Oxomemazine • Phenindamine • Pheniramine • Phenyltoloxamine • Pimethixene • Piperoxan • Promethazine • Propiomazine • Pyrrobutamine • Talastine • Thenalidine • Thenyldiamine • Thiazinamium • Thonzylamine • Tolpropamine • Tripelennamine • Triprolidine; 2nd generation: Acrivastine • Astemizole • Azelastine • Cetirizine • Clemizole • Clobenztropine • Ebastine • Emedastine • Epinastine • Ketotifen • Latrepirdine • Levocabastine • Loratadine • Mebhydrolin • Mizolastine • Olopatadine • Rupatadine • Setastine • Terfenadine; 3rd generation: Desloratadine • Fexofenadine • Levocetirizine; Miscellaneous: Tricyclic Antidepressants (Amitriptyline, Doxepin, Trimipramine, etc) • Tetracyclic Antidepressants (Mianserin, Mirtazapine, etc) • Serotonin Antagonists and Reuptake Inhibitors (Trazodone, Nefazodone) • Typical Antipsychotics (Chlorpromazine, Thioridazine, etc) • Atypical Antipsychotics (Clozapine, Olanzapine, Quetiapine, etc)
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 • Quisultidine/Quisultazine • Ramixotidine • Ranitidine • Roxatidine • Sufotidine • Tiotidine • Tuvatidine • Venritidine • Zaltidine
H₃	Agonists: α-Methylhistamine • Cipralisant • Histamine • Imetit • Immepip • Immethridine • Methimepip • Proxyfan Antagonists: A-349,821 • A-423,579 • ABT-239 • Betahistine • Burimamide • Ciproxifan • Clobenpropit • Conessine • GSK-189,254 • Impentamine • Iodophenpropit • JNJ-5,207,852 • MK-0249 • NNC-38-1,049 • PF-03654746 • SCH-79,687 • Thioperamide • Tiprolisant • VUF-5,681
H₄	Agonists: 4-Methylhistamine • Histamine • VUF-8,430 Antagonists: JNJ-7,777,120 • Thioperamide • VUF-6,002

Reuptake
inhibitors

Vesicular

VMAT inhibitors	Ibogaine • Reserpine • Tetrabenazine

Enzyme
inhibitors

Anabolism

HDC inhibitors	α-FMH • Brocresine • Catechin • Cyanidanol-3 • McN-A-1293 • ME • Meciadanol • Naringenin • Thiazol-4-yimethoxyamine • Tritoqualine • Zy-15,029

Catabolism

HNMT inhibitors	Amodiaquine • BW-301U • Diphenhydramine • Harmaline • Metoprine • Quinacrine • SKF-91,488 • Tacrine
DAO inhibitors	1,4-Diamino-2-butyne • Aminoguanidine

Others

Precursors	L-Histidine
Cofactors	Vitamin B6 (pyridoxine, pyridoxamine, pyridoxal → Pyridoxal phosphate)

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A-349,821

References

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