O=C(NCCC[C@H]1CN2C(=NC[C@@H]2Cc2ccc(O)cc2)N1CCc1ccc(Cl)c(Cl)c1)C1CCC1
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?