Cc1ccc([N+](=O)[O-])cc1S(=O)(=O)Nc1ccc(C2=NN(S(=O)(=O)c3cc([N+](=O)[O-])ccc3C)C(c3ccco3)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?