JBJ-09-063 hydrochloride is a mutant-selective allosteric inhibitor of EGFR with IC50 values of 0.147 nM, 0.063 nM, 0.083 nM and 0.396 nM for EGFR L858R, EGFR L858R/T790M, EGFR L858R/T790M/C797S and EGFRLT/L747S, respectively. JBJ-09-063 hydrochloride significantly inhibits the phosphorylation of EGFR, Akt, and ERK1/2.