C=C(C(=O)O)[C@@H]1C[C@@H]2O[C@H]1[C@@H](O)[C@@H](C)CCC/C(C)=C\CC[C@@]2(C)O
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?