COC(=O)[C@H](Cc1ccccc1)NC(=O)O[C@@H]1C(=O)c2cc(OC)ccc2O[C@H]1c1cccc(OC)c1
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?