Figure 2.

(A–C) 3D representations of the binding poses of standard and test compounds in complex with human AChE (PDB ID: 4EY7). The hydrophobic surfaces of the interacting residues are shown in blue relief. Ligand–protein interactions are depicted with dotted lines: hydrogen bonds (green), π-cation interactions (orange), π-halogen interactions (purple). (A) donepezil; (B) propidium and tacrine; (C) compound 10; (D) Schematic representation of the binding interactions of compound 10. Hydrogen bonds and π–π stacking interactions are depicted with black and green dotted lines, respectively. The green curve represents other non-polar interactions.