COc1cc(O)c2c(=O)c3c(O[C@H]4O[C@@H](CO)[C@H](O)[C@@H](O)[C@@H]4O)ccc(O)c3oc2c1
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?