CC1(C)O[C@@H]2[C@@H](COS(=O)(=O)[O-])O[C@@H](n3ccc(=O)[nH]c3=O)[C@@H]2O1.[K+]
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?