CN[C@@H](C)C(=O)N[C@@H](CCC(N)=O)C(=O)N1CCC[C@H]1C(=O)NC1CCCc2ccccc21.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?