O=C1[C@H]2O[C@@H]2[C@@H](O)[C@H]2[C@H]1CCn1c(=O)n(Cc3cc4c(cc3Cl)OCO4)c(=O)n12
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?