CSF1R-IN-3 (compound 21) is a potent and orally active CSF-1R inhibitor (IC50=2.1 nM). CSF1R-IN-3 is a potent antiproliferative activity against colorectal cancer cells. CSF1R-IN-3 inhibits the progression of colorectal cancer by suppressing the migration of macrophages, reprograming M2-like macrophages to the M1 phenotype, and enhancing the antitumor immunity[1].
[1]. Lv Q, et al. Discovery of (Z)-1-(3-((1H-Pyrrol-2-yl)methylene)-2-oxoindolin-6-yl)-3-(isoxazol-3-yl)urea Derivatives as Novel and Orally Highly Effective CSF-1R Inhibitors for Potential Colorectal Cancer Immunotherapy. J Med Chem. 2021;64(23):17184-17208.