COC(=O)C(NC(=O)c1ccccc1Cl)(Nc1ncc(S(=O)(=O)c2ccc([N+](=O)[O-])cc2)s1)C(F)(F)F
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?