COc1ccc(-c2c([C@H]3[C@@H]4C=CCC[C@@]4(C)C(=O)N3Cc3ccccc3)ccc3ccccc23)cc1OC
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?