O=C(Nc1ccc(N2C(=O)c3cccc4cccc(c34)C2=O)cc1)c1ccc(N2CCCCC2)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?