NC(=O)c1ncn([C@@H]2O[C@H](CNS(=O)(=O)c3cc(S(=O)(=O)c4ccccc4)cs3)[C@@H](O)[C@H]2O)n1
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?