(R)-Vanzacaftor ((R)-VX-121) is a regulator of cystic fibrosis transmembrane conduction regulator (CFTR)[1].
References
[1] Jeremy J. Clemens, et al. Modulators of Cystic Fibrosis Transmembrane Conductance Regulator, Pharmaceutical Compositions, Methods of Treatment, and Process for Making the Modulators. US20190248809A1.2019-08-15.