ZM323881 is also known as (5?{[7?(benzyloxy) quinazolin?4?yl]amino}?4?fluoro?2?methylphenol). It is capable of blocking the efflux function and altering breast cancer resistant protein (BCRP)-related multidrug resistance (MDR).
ZM323881 is a selective inhibitor of VEGFR-2 with an IC50 value of 2 nM. ZM323881 is selective for VEGFR-2 over VEGFR-1 and other receptor tyrosine kinases including PDGFRβ, FGFR1, EGFR and erbB2. ZM323881 inhibited VEGF-A-induced endothelial cell proliferation with an IC50 value of 8 nM.