(a): MAOA active site with ligand and co-enzyme (protein MAOA is shown in blue, compound in yellow and FAD co-enzyme in orange). (b) MAOB active site with ligand and co-enzyme (protein MAOB is shown in blue, compound in yellow and FAD co-enzyme in orange). (c,d) Interaction between the first ranked compound ((−)-epicatechin-3-gallate) with the target protein. (e,f) Interaction between the second-ranked compound (quercetin) with the target protein. (g,h) Interaction between the third-ranked compound (myricetin) with the target protein. (i,j) Interaction between the fourth-ranked compound (luteolin) with the target protein. (In 3D interaction figures, MAOA and MAOB are shown in blue, compounds in yellow, and FAD co-enzyme in orange).