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Clinical data
Other namesTA-2005; CHF-4226
Routes of
ATC code
  • None
Legal status
Legal status
  • Development terminated
  • 8-Hydroxy-5-[(1R)-1-hydroxy-2-[[(2R)-1-(4-methoxyphenyl)propan-2-yl]amino]ethyl]-1H-quinolin-2-one
CAS Number
PubChem CID
Chemical and physical data
Molar mass368.433 g·mol−1
3D model (JSmol)
  • COc1ccc(C[C@@H](C)NC[C@H](O)c2ccc(O)c3NC(=O)C=Cc23)cc1
  • InChI=1S/C21H24N2O4/c1-13(11-14-3-5-15(27-2)6-4-14)22-12-19(25)16-7-9-18(24)21-17(16)8-10-20(26)23-21/h3-10,13,19,22,24-25H,11-12H2,1-2H3,(H,23,26)/t13-,19+/m1/s1

Carmoterol (INN;[1] development codes TA-2005 and CHF-4226) is a non-catechol[2] experimental ultra-long-acting β adrenoreceptor agonist (ultra-LABA)[2][3] that was in clinical trials before 2010 when it has been withdrawn from further development based on evidence that the compound does not possess a competitive profile.[4]

Preliminary studies indicated duration of its effect exceeding 24 hours after inhalation of 3 μg.[2] The pharmacologic profile of this medication included the fact its potency in isolated guinea pig trachea is greater than that of formoterol and salmeterol. It is over 100 times more selective for bronchial muscle than myocardial tissue.[5]


  1. ^ "International Nonproprietary Names for Pharmaceutical Substances (INN). Recommended International Nonproprietary Names: List 53" (PDF). WHO Drug Information. 19 (1): 74. 2005. Retrieved 25 March 2016.
  2. ^ a b c Mario C, Monica K (2008). "27. Bronchodilators: Beta2-Agonists and Anticholingercs". Clinical Asthma. 1600 John F. Kennedy Boulevard, Suite 1800, Philadelphia, PA 19103–2899: Mosby / Elsevier Health Sciences. ISBN 978-0-323-04289-5.{{cite book}}: CS1 maint: location (link)
  3. ^ Cazzola M, Calzetta L, Matera MG (May 2011). "β(2) -adrenoceptor agonists: current and future direction". British Journal of Pharmacology. 163 (1): 4–17. doi:10.1111/j.1476-5381.2011.01216.x. PMC 3085864. PMID 21232045.
  4. ^ "Chiesi: Annual Report 2010" (PDF). Chiesi Farmaceutici S.p.A. p. 20. Retrieved 27 March 2016.
  5. ^ Donohue JF (2006). "New Options in COPD Therapy". Medscape. Retrieved 27 March 2016.