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Cediranib (also known as AZD2171) is a highly potent KDR tyrosine kinase inhibitor that ATP-competitively inhibits recombinant KDR tyrosine kinase as well as other members of vascular endothelial growth factor receptor (VEGFR) family, including Flt-1 (VEGFR-1) and Flt-4 (VEGFR-3) with the half maximal inhibition concentration IC50 values of <0.001 μmol/L, 0.005 μmol/L and <0.003 μmol/L respectively [1].

Cediranib also potently inhibits a few members of platelet-derived growth factor receptor (PDGFR) family, including c-Kit, PDGFR-β, PDGFR-α, CSF-1R and Flt-3, with IC50 values of 0.002 μmol/L, 0.005 μmol/L, 0.036 μmol/L, 0.11 μmol/L anf > 1 μmol/L respectively due to their similar structure to VEGFR family members [1].

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