CC1=NN(C(=O)CC(=O)Nc2cccc(Cl)c2)C(=O)C1/N=N/c1ccc(S(N)(=O)=O)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?