COc1ccc([N+](=O)[O-])cc1N(CC(O)CN1C(=O)NC(C)(C)C1=O)S(=O)(=O)c1ccccc1
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?