Nc1nc(O)c2nc(Br)n([C@@H]3O[C@@H]4COP(=O)([O-])O[C@H]4[C@H]3O)c2n1.[Na+]
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?