O=C1NC(c2ccc(-c3ccccc3[N+](=O)[O-])o2)C(C(=O)c2ccc(Cl)cc2)C(O)(C(F)(F)F)N1
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?