C[C@@H]1COC(=O)[C@@H](CC(=O)OC(C)(C)C)C/C=C\C[C@@H](CC(=O)N[C@H](CO)Cc2ccccc2)C(=O)N1
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?