IACS-13909 is a selective, potent and orally active SHP2 allosteric inhibitor with an IC50 of 15.7 nM and a Kd of 32 nM. IACS-13909 is more selective for SHP2 than other phosphatases (including SHP1). IACS-13909 has antitumor activities and suppresses MAPK pathway signaling in receptor tyrosine kinases (RTK)-dependent cancers[1].