C=C1C(=O)O[C@H]2[C@@H]1[C@H](OC(=O)/C(C)=C/C)[C@]1(C)C(=O)C=C[C@H]1[C@H](C)[C@H]2O
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?