CCOc1ccc(N/C(=C(C(/Cl)=C(/Cl)NC(C)(C)C)\[N+](=O)[O-])n2nnc3ccccc32)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?