Selpercatinib (LOXO-292, ARRY-192) is a potent and specific RET (c-RET) inhibitor with IC50 values of 1 nM, 2 nM, 2 nM, 4 nM, 2 nM, 2 nM for WT RET, RET V804M, RET V804L, RET A883F, RET M918T and RET S891A respectively.