Legal status
Legal status
  • Investigational
CAS Number
PubChem CID
Chemical and physical data
Formula C20H26N4O4
Molar mass 386.44484 g/mol
3D model (JSmol)

Bevenopran (INN, USAN) (former developmental code names CB-5945, ADL-5945, MK-2402, OpRA III) is a peripherally selective μ- and δ-opioid receptor antagonist that was under development by Cubist Pharmaceuticals for the treatment of chronic opioid-induced constipation.[1][2][3] It reached phase III clinical trials for this indication before being discontinued.[4][5]

See also


  1. Diego L, Atayee R, Helmons P, Hsiao G, von Gunten CF (2011). "Novel opioid antagonists for opioid-induced bowel dysfunction". Expert Opin Investig Drugs. 20 (8): 1047–56. doi:10.1517/13543784.2011.592830. PMID 21663526.
  2. Siemens W, Gaertner J, Becker G (2015). "Advances in pharmacotherapy for opioid-induced constipation - a systematic review". Expert Opin Pharmacother. 16 (4): 515–32. doi:10.1517/14656566.2015.995625. PMID 25539282.
  3. Annual Reports in Medicinal Chemistry. Elsevier Science. 13 September 2013. pp. 451–. ISBN 978-0-12-417151-0.
  4. Combating Opioid-Induced Constipation: New and Emerging Therapies
  5. Bevenopran

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