O=C(COc1cc2oc(=O)cc(-c3ccccc3)c2cc1Cl)NC(Cc1c[nH]c2ccc(O)cc12)C(=O)O
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?