[O-][Cl+3]([O-])([O-])[O-].c1ccc(-c2ccc(-c3n(-c4ccccn4)c4ccccc4[n+]3-c3ccccn3)cc2)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?