O=C1c2ccccc2C(=O)[C@]23O[C@]12[C@@H](O)[C@H]1O[C@H]1C31Oc2cccc3cccc(c23)O1
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?