NX-2127 (ETX2514 Triethylamine) is an orally active BTK inhibitor that induces degradation of mutant BTKC481S in cells.NX-2127 has potent antiproliferative activity and inhibits the proliferation of BTKC481S mutant TMD8 cells.

BTK inhibitor 4b is a potent, highly selective inhibitors of BTK with IC50 of 4.2 and 0.9 nM against activated and unactivated BTK, respectively.

Vecabrutinib (SNS-062) is a potent, reversible, non-covalent BTK inhibitor with IC50 of 2.9 and 4.4 nM for WT BTK and C481S BTK, respectively;