Syk-IN-4 is a potent, selective, and orally bioavailable inhibitor of SYK, demonstrating an IC50 of 0.31 nM. It targets SYK, which has been identified as a potential therapeutic target for autoimmunity and hematological cancers[1].

Syk-IN-4 is a potent inhibitor of hERG with an IC50 of 3.0 μM[1].Syk-IN-4 inhibits SUDHL-4 and T cell proliferation with GI50s of 0.24 and 2.6 μM, respectively[1].

Syk-IN-4 exhibits moderate oral bioavailability (60%) following oral administration (1 mg/kg) in male Hans Wistar rats[1]. Syk-IN-4 exhibits high plasma clearance (151 mL/min/kg) combined with large volumes of distribution (1.0 L/kg respectively) following i.v. administration (0.5 mg/kg) in male Hans Wistar rats[1].