C=[N+](CNC(=O)CNC(=O)C(Cc1ccccc1)NC(=O)OC(C)(C)C)C(=O)CNC(=O)C(Cc1ccccc1)NC(=O)OC(C)(C)C
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?