O=C1[C@@H]2Cc3c([nH]c4ccccc34)C(c3cccc([N+](=O)[O-])c3)N2C(=O)CN1C1CCN(Cc2ccccc2)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?