Cc1nnc(SCC2=C(C(=O)[O-])N3C(=O)C(NC(=O)Cc4ccccc4)C3SC2)s1.[Na+]
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?