COc1ccc(N2C(=O)C3[C@@H](C2=O)C2(Cl)C(Cl)=C(Cl)C3(Cl)C2(OC)OC)cc1
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?