CS[C@]12[C@@H]3C(=O)N(C)C(=O)[C@@H]3[C@](C)(C(=O)N1C)C(=O)N2c1ccccc1
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?