CC(C)(C)OC(=O)N1C[C@H](CC(=O)OCc2ccccc2)C[C@H]1C(=O)OCC(Cl)(Cl)Cl
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?