CS(=O)(=O)c1ccc(C(=O)NCCN2C(=O)S/C(=C\c3cccnc3)C2=O)cc1[N+](=O)[O-]
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?