CC(=O)OC1C[C@@]2(C)C(c3ccoc3)OC(=O)C3O[C@@]32[C@]2(C)C(OC(C)=O)CC3C(C)(C)C(OC(C)=O)CC(OC(C)=O)[C@@]3(C)C12
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?