NC(=O)CC(NC(=O)Cc1ccc(Br)cc1)c1ccc(NCc2cc(F)ccc2F)c([N+](=O)[O-])c1
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?