CC1(C)CC[C@]2(C(=O)O)CC[C@]3(CO)C(=CCC4[C@@]5(C)C[C@H](O)[C@H](O)[C@@](C)(C(=O)O)C5CC[C@]43C)[C@@H]2C1
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?