CC[C@H]1O[C@@H](n2cnc3c(Nc4ccc(CC(=O)Nc5ccc(CC(=O)NCCN)cc5)cc4)ncnc32)[C@H](O)[C@@H]1O
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?