CN[C@@H](C)C(=O)N[C@H](C(=O)N[C@H](C(=O)Nc1cccc2ccccc12)C(C)O)C(C)C.O=CO
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?