From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
RS-127,445 structure.png
Clinical data
CAS Number
PubChem CID
Chemical and physical data
Molar mass281.327 g/mol g·mol−1
3D model (JSmol)

RS-127445 is a drug which acts as a potent and selective antagonist at the serotonin 5-HT2B receptor, with around 1000x selectivity over the closely related 5-HT2A and 5-HT2C receptors.[1] The role of the 5-HT2B receptor in the body is still poorly understood, and RS-127445 has been a useful tool in unravelling the function of the various systems in which this receptor is expressed.[2][3][4]


  1. ^ Bonhaus DW, Flippin LA, Greenhouse RJ, Jaime S, Rocha C, Dawson M, Van Natta K, Chang LK, Pulido-Rios T, Webber A, Leung E, Eglen RM, Martin GR. RS-127445: a selective, high affinity, orally bioavailable 5-HT2B receptor antagonist. British Journal of Pharmacology. 1999 Jul;127(5):1075-82. doi:10.1038/sj.bjp.0702632 PMID 10455251
  2. ^ Launay JM, Hervé P, Peoc'h K, Tournois C, Callebert J, Nebigil CG, Etienne N, Drouet L, Humbert M, Simonneau G, Maroteaux L. Function of the serotonin 5-hydroxytryptamine 2B receptor in pulmonary hypertension. Nature Medicine. 2002 Oct;8(10):1129-35. doi:10.1038/nm764 PMID 12244304
  3. ^ Kelly CR, Sharif NA. Pharmacological evidence for a functional serotonin-2B receptor in a human uterine smooth muscle cell line. Journal of Pharmacology and Experimental Therapeutics. 2006 Jun;317(3):1254-61. PMID 16517693
  4. ^ Mbaki Y, Ramage AG. Investigation of the role of 5-HT2 receptor subtypes in the control of the bladder and the urethra in the anaesthetized female rat. British Journal of Pharmacology. 2008 Oct;155(3):343-56. PMID 18604238