2429877-30-3

SI-109 is a potent STAT3 SH2 domain inhibitor (Ki=9 nM) with antitumor activity. SI-109 effectively inhibits the transcriptional activity of STAT3 (IC50=3 μM). SI-109 and an analog of CRBN ligand lenalidomide have been used to design PROTAC STAT3 degrader SD-36[1].

STAT3: 9 nM (Ki)

[1] Bai L, et al. A Potent and Selective Small-Molecule Degrader of STAT3 Achieves Complete Tumor Regression In Vivo. Cancer Cell. 2019 Nov 11;36(5):498-511.e17. DOI:10.1016/j.ccell.2019.10.002