C[C@@H]1CC2[C@@H]3CC[C@H]4CC(=O)CC[C@]4(C)C3=CC[C@]2(C)[C@@]1(O)C(=O)CO
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?