O=C(Nc1cc(-c2nn(CC(=O)N3CCCCC3)c(=O)c3ccccc23)ccc1N1CCOCC1)c1ccc(Cl)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?