Fruquintinib is a potent and highly selective inhibitor of VEGFR kinase (IC50s: VEGFR1= 33 nM, VEGFR2 = 35 nM, VEGFR3 = 0.5 nM).1 It potently inhibited VEGF/VEGFR signaling and cell proliferation in HUVECs and HLECs and prevented angiogenesis in vitro.
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