CC[C@@H](c1ccccc1)n1c(=O)n2n(c1=O)[C@@H]1[C@H](CC2)C(=O)[C@@H]2O[C@@H]2[C@H]1O
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?