C[C@H](N)C(=O)N[C@H]1[C@@H](C)OC(=O)C2=C(O)C[C@@H](O)[C@H](O)[C@H]21
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?