O=C1c2cccc(O)c2C(=O)c2c(O[C@@H]3O[C@H](CO)[C@@H](O)[C@H](O)[C@@H]3O)cccc21
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?