CHMFL-EGFR-202 is a potent, irreversible inhibitor of epidermal growth factor receptor (EGFR) mutant kinase, with IC50s of 5.3 nM and 8.3 nM for drug-resistant mutant EGFR T790M and WT EGFR kinases, respectively. CHMFL-EGFR-202 exhibits ∼10-fold selectivity for EGFR L858R/T790M against the EGFR wild-type in cells. CHMFL-EGFR-202 adopts a covalent “DFG-in-C-helix-out” inactive binding conformation with EGFR, with strong antiproliferative effects against EGFR mutant-driven nonsmall-cell lung cancer (NSCLC) cell lines[1].
Poseltinib, an orally active, selective and irreversible Bruton’s tyrosine kinase (BTK) inhibitor (IC50 =1.95 nM), with 0.3, 2.3 and 2.4-fold selectivity for BTK over BMX, TEC and TXK, respectively. Poseltinib can covalently bind to the active site (cysteine 481 residue) of BTK, and reveales potent inhibition of B cell receptor (BCR), Fc receptor (FcR), Toll-like receptor (TLR) mediated signaling[1].
BMX-IN-1 is a selective, irreversible inhibitor of bone marrow tyrosine kinase on chromosome X (BMX) that targets Cys496 in the BMX ATP binding domain with an IC50 of 8 nM, also targets the related Bruton’s tyrosine kinase (BTK) with an IC50 value of 10.4 nM, but is more than 47-656-fold less potent against Blk, JAK3, EGFR, Itk, or Tec activity.
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; demonstrates significant efficacy in models in vivo and good ADME and safety profiles.
CHMFL-BMX-078 is a highly potent and selective type II irreversible BMX kinase inhibitor with an IC50 of 11 nM.