C[C@@]12CCC(=O)C=C1C[C@H](O)[C@@H]1[C@@H]2CC[C@]2(C)[C@H]1CC[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?