COc1cccc2c1[C@H](CO)N1[C@H](C#N)[C@@H]3C[C@H](C(=O)O)[C@@H]([C@@H]1C2)N3C
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?