COc1ccc(NC(=O)Nc2cccc3c2O[C@H](CN(C)S(=O)(=O)c2ccccc2)[C@@H](C)CN([C@H](C)CO)C3=O)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?