CCN1C[C@@H]2[C@@H]3C(=O)N(C)C(=O)[C@@H]3[C@](C)(C1=O)N2C(=O)c1ccc(Cl)cc1
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?