COC(=O)CCC(=O)OC1(C)C(=O)C=C2C=C(C3CC3)N(Cc3ccc4c(c3)OCO4)C=C2C1=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?