CO[C@@H]1COC(=O)[C@@H](C)NC(=O)C/C=C\[C@H](C)[C@@H](OC)COC(=O)C/C=C\[C@@H]1C
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?