O=C(CC(=O)n1nc(-c2ccccc2)c(/N=N/c2ccc([N+](=O)[O-])cc2)c1-c1ccccc1)Nc1ccc(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?