O=C(Nc1ccc(Cl)cc1)[C@@H]1[C@@H]2C(=O)N(c3ccc(Cl)cc3Cl)C(=O)[C@@H]2[C@H]2C=CC=NN12
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?