CS(=O)(=O)C1=NSC2=NC(=O)/C(=C\c3ccc(OS(=O)(=O)c4ccccc4)cc3)C(=N)N21
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?