Furthermore, TPX-0131 demonstrated antiproliferation IC50 values <2 nM in Ba/F3 cell models engineered with compound mutations including L1196M/G1202R, L1198F/G1202R, L1196M/L1198F, and C1156Y/G1202R, while lorlatinib and other ALK inhibitors are not active (IC50s >1 μM).