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The docked conformation of compounds 1–4 with comparison with their corresponding ligands and gefitinib at the ATP binding cleft of EGFR kinase. (a,b) Complex 1; (c,d) complex 2; (e,f) complex 3; (g,h) complex 4; (i,j) gefitinib. The red molecules in stick model in (a,c,e,g) are the corresponding ligands L1 and L2.
