Flonoltinib (E4720-GRP)

Flonoltinib (JAK2/FLT3-IN-1) is a potent and selective dual inhibitor of JAK2 and FLT3, with IC50 of of 0.8, 1.4, and 15 nM against JAK2, JAK2V617F, and FLT3, respectively, in in vitro kinase assays. It also inhibits cell proliferation and induces G2/M cell cycle arrest and apoptosis in Hemophagocytic Lymphohistiocytosis (HLH) patients' CD8+T cells, CTLL2 cells, and RAW 264.7 cells.