5-Chloro-N-[(1S)-1-(5-fluoropyridin-2-yl)ethyl]-N'-(5-isopropoxy-1H-pyrazol-3-yl)pyrimidine-2,4-diamine (AZ-23) is a potent and selective tyrosine kinase inhibitor which may be used in the therapeutic treatment of cancers.
AZ-23 is an ATP-competitive, orally active Trk kinase A/B/C inhibitor with IC50 values of 2 nM (TrkA), 8 nM (TrkB), 24 nM (FGFR1), 52 nM (Flt3) , 55 nM (Ret), 84 nM (MuSk), 99 nM (Lck).