COC(=O)c1ccc(CN2[C@H](C(=O)OC)C[C@@]3(O)[C@@H](O)[C@@H](O)[C@@H](O)C[C@@H]23)cc1
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?