COc1ccccc1N1CCN(C(=O)c2cc(C(=O)N3CCN(c4ccccc4OC)CC3)cc([N+](=O)[O-])c2)CC1
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?