COc1ccc(S(=O)(=O)N(C)C[C@@H]2OCc3cnnn3CCCC(=O)N([C@H](C)CO)C[C@@H]2C)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?