Retosiban (GSK221149A) is a potent and selective oxytocin antagonist with a Ki of 0.65 nM.
Definition
ChEBI: Retosiban is a dipeptide.
References
[1] Liddle J, et al. The discovery of GSK221149A: a potent and selective oxytocin antagonist. Bioorg Med Chem Lett. 2008 Jan 1;18(1):90-4. DOI:10.1016/j.bmcl.2007.11.008