Cc1ccc(C)c(Nc2c([N+](=O)[O-])cc(C(=O)N3CC(=O)Nc4ccccc43)cc2[N+](=O)[O-])c1
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?