C[C@@H]1O[C@@H](OC2C(O)C(OCCc3ccc(O)c(O)c3)OC(CO)C2OC(=O)/C=C/c2ccc(O)c(O)c2)[C@H](O)[C@H](O)[C@H]1O
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?