CC1CC(=O)C(CC(=O)O)C1C(C(=O)C(=O)Nc1c(C#N)cccc1[N+](=O)[O-])[N+](=O)[O-]
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?