NVL-655 is a selective inhibitor of anaplastic lymphoma kinase (ALK), with potential antineoplastic activity in the Ba/F3 xenograft model. It also exhibits significant inhibitory activity against ROS1, LTK, PYK2, TRKB, and FAK, with an IC50 ≤10-fold ALK and demonstrates high potency against specific ALK mutations, with an IC50 of <0.73 nM, 7 nM, 3 nM, 3 nM for G1202R, G1202R/L1196M, G1202R/G1269A and G1202R/L1198F respectively.