CCCCCCCCCCCCCC1=C(O)C(=O)C(CC2=C(O)C(=O)C(CCCCCCCCCCCCC)=C(O)C2=O)=C(O)C1=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?