CCCCCC(C)(C)CCC(=O)OC1OC(COC2OC(COC3OC(CO)C(O)C(O)C3O)C(O)C(O)C2O)C(O)C(O)C1O
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?