COc1ccc([N+](=O)[O-])cc1N=C(S)NC(NC(=O)C(c1ccccc1)c1ccccc1)C(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?