COC(=O)CNC(=O)CN1C(=O)N(c2cccc(Cl)c2)C(N(O)C(=O)Nc2cccc(Cl)c2)C1(C)C
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?