The co-crystal structure of compound 12 bound to ALK L1196M protein (PDB 4CD0, 2.23 Å). Interaction of compound 12 into the binding site of the protein. The protein is depicted as yellow ribbons, and the hydrogen bonds are illustrated with blue dashed lines. Compound 12 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.