COC(=O)C1=C(OC(=O)/C=C/c2ccc(Cl)cc2)C(C(=O)OC)[C@@]2(O)[C@@H](C(=O)OC)[C@H](C)C[C@@H]1[C@@H]2C(=O)OC
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?