Figure 3:Eticlopride molecule. (A) Chemical structure with atoms labeled. Region i represents the pyrrolidine moiety with the tertiary amine protonated, as observed at physiological pH; region ii represents the amide group; and region iii the aromatic moiety with substituents. (B) Electron density projected onto an electrostatic potential isosurface showing negatively charged regions in red and positively charged regions in blue.