Imatinib Impurity E is the impurity of Imatinib. Imatinib is an orally bioavailable tyrosine kinases inhibitor that selectively inhibits BCR/ABL, v-Abl, PDGFR and c-kit kinase activity. Imatinib (STI571) works by binding close to the ATP binding site, locking it in a closed or self-inhibited conformation, therefore inhibiting the enzyme activity of the protein semicompetitively^[4]. Imatinib also is an inhibitor of SARS-CoV and MERS-CoV^[5].

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  [5]. Jeanne M Sisk, et al. Coronavirus S Protein-Induced Fusion Is Blocked Prior to Hemifusion by Abl Kinase Inhibitors. J Gen Virol. 2018 May;99(5):619-630.  [Content Brief]