Open Access Articles- Top Results for ELB-139


Systematic (IUPAC) name
Clinical data
188116-08-7 7pxY
PubChem CID 11277418
ChemSpider 9452418
Chemical data
Formula C14H16ClN3O
277.749 g/mol
 14pxY (what is this?)  (verify)

ELB-139 (LS-191,811) is an anxiolytic drug with a novel chemical structure, which is used in scientific research. It has similar effects to benzodiazepine drugs, but is structurally distinct and so is classed as a nonbenzodiazepine anxiolytic.[1][2]

ELB-139 is a subtype-selective partial agonist at GABAA receptors, with highest affinity for the α3 subtype, but highest efficacy at α1 and α2.[3] It has primarily anxiolytic and anticonvulsant effects, but produces little sedative effects or ataxia,[4] and has also been demonstrated in rats to increase serotonin levels in the striatum and prefrontal cortex, without affecting dopamine levels.[5] It has been proposed as a possible candidate for a novel non-sedating anxiolytic or anticonvulsant drug for use in humans[6] The sponsor elbion AG registered a clinical trial in for the treatment of anxiety associated with panic disorder but the results have not been reported.[7] It was developed by Arzeitmittelwerk Dresden in the 1990s.[8]


  1. Langen, B; Egerland, U; Bernöster, K; Dost, R; Unverferth, K; Rundfeldt, C (2005). "Characterization in rats of the anxiolytic potential of ELB139 1-(4-chlorophenyl)-4-piperidin-1-yl-1,5-dihydro-imidazol-2-on, a new agonist at the benzodiazepine binding site of the GABAA receptor". The Journal of Pharmacology and Experimental Therapeutics 314 (2): 717–24. PMID 15860576. doi:10.1124/jpet.105.084681. 
  2. Atack, JR (2005). "The benzodiazepine binding site of GABA(A) receptors as a target for the development of novel anxiolytics". Expert Opinion on Investigational Drugs 14 (5): 601–18. PMID 15926867. doi:10.1517/13543784.14.5.601. 
  3. Rabe, H; Kronbach, C; Rundfeldt, C; Lüddens, H (2007). "The novel anxiolytic ELB139 displays selectivity to recombinant GABA(A) receptors different from diazepam". Neuropharmacology 52 (3): 796–801. PMID 17087982. doi:10.1016/j.neuropharm.2006.09.013. 
  4. Grunwald, C; Rundfeldt, C; Lankau, HJ; Arnold, T; Höfgen, N; Dost, R; Egerland, U; Hofmann, HJ; Unverferth, K (2006). "Synthesis, pharmacology, and structure-activity relationships of novel imidazolones and pyrrolones as modulators of GABAA receptors". Journal of Medical Chemistry 49 (6): 1855–66. PMID 16539371. doi:10.1021/jm0509400. 
  5. Langen, B; Rundfeldt, C (2007). "ELB139 an agonist at the benzodiazepine binding site increases 5-HT in the striatum and prefrontal cortex of rats: a microdialysis study". Pharmacology, Biochemistry, and Behavior 86 (1): 79–85. PMID 17257662. doi:10.1016/j.pbb.2006.12.010. 
  6. Rogawski, MA (2006). "Diverse mechanisms of antiepileptic drugs in the development pipeline". Epilepsy Res 69 (3): 273–294. PMC 1562526. PMID 16621450. doi:10.1016/j.eplepsyres.2006.02.004. 
  7. Whiting, PJ (2006). "GABA-A receptors: a viable target for novel anxiolytics?". Current Opinion in Pharmacology 6 (1): 24–9. PMID 16359919. doi:10.1016/j.coph.2005.08.005. 
  8. US Patent 5869481 Anticonvulsive 1-ar(alk)ylimidazolin-2-ones and process for making

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