CC(OC(C)(C)C)C(NC(=O)OCC1c2ccccc2-c2ccccc21)C(=O)NC(Cc1ccccc1)C(=O)OCc1ccccc1
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?