O=C(NCc1ccccc1Cl)c1ccc2[nH]c([C@@H]3O[C@H](CO)[C@@H](O)[C@H]3O)nc2c1
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?