C(=C/c1ccnc2ccccc12)\c1ccc(-[n+]2cc[n+](-c3ccc(/C=C/c4ccnc5ccccc45)cc3)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?