CCN1C(=O)[C@H]2[C@@H](C)C3=C4C([C@H](C(=O)OC)C=C(C(=O)OC)C[C@H]4[C@H]2C1=O)C(CC)(CC)C3=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?