C=C1C(=O)OC2/C=C(/C)C(OC(C)=O)C/C=C(\C)C(OC(=O)C3(C)OC3C)C(O)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?