COc1cc(/C=C2/C(=N)N3C(=NC2=O)SN=C3S(C)(=O)=O)ccc1OS(=O)(=O)c1ccc(C)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?