C=C1C(=O)[C@]23C[C@H]1CC[C@H]2[C@]1(C)[C@@H](OC(C)=O)CC[C@@](C)(C(=O)O)[C@H]1C[C@@H]3O
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?