CCC[C@@H]1C[C@@H](C(=O)N[C@@H](C2O[C@H](SC)[C@H](O)[C@@H](O)[C@H]2O)[C@H](C)Cl)N(C)C1.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?