Cc1ccc(-c2nc3cc(C(C)C)ccc3o2)cc1NC(=O)c1cc([N+](=O)[O-])ccc1N1CCOCC1
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?