Compound 90b docked into the ATP binding pocket of EGFR (PDB 5FBN, 3.17 Å). Left Panel: Interaction of compound 90b with the protein. The protein is depicted as yellow ribbons, and the hydrogen bonds are illustrated with blue dashed lines; Right panel: The binding site of compound 90b in EGFR. The protein surface is depicted in blue. Compound 90b atoms are colored as follows: carbon, red-orange; nitrogen, blue; oxygen, red; chlorine, green; fluorine, jade; hydrogen, white; the chiral carbon is highlighted in violet..