Cc1ccc([N+](=O)[O-])cc1S(=O)(=O)Nc1ccc(C2=NN(c3ccc([N+](=O)[O-])cc3[N+](=O)[O-])C(c3cccs3)C2)cc1
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?