O=C(NNC(=O)C1CCN(S(=O)(=O)c2ccc(Cl)cc2)CC1)c1ccc(S(=O)(=O)N2CCCCC2)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?