O=C(Nc1cccc(-c2csc(Nc3cccc(C(F)(F)F)c3)n2)c1)c1cc([N+](=O)[O-])cc(C(F)(F)F)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?