Zeteletinib (BOS-172738; DS-5010) is an orally active, selective RET kinase inhibitor with nanomolar potency against RET and >300-fold selectivity against VEGFR2. Zeteletinib shows exquisite potency for the wild type RET, RETV804M/L gatekeeper mutants, and the most common oncogenic RET mutation M918T. Zeteletinib has potent antitumor activity[1][2][3].