C[n+]1c(-c2ccccc2)cc2/c(=C\c3ccc([N+](=O)[O-])cc3)c3ccccc3n21.O=S(=O)([O-])C(F)(F)F
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?