COc1ccccc1C(=O)N/C(=C/c1cccc([N+](=O)[O-])c1)C(=O)Nc1cccc(C(=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?