O=C(O)CC/C=C\CC[C@@H]1[C@@H](OCc2ccc(-c3ccccc3)cc2)C[C@H](O)[C@@H]1N1CCCCC1
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?