Cc1ccc(/N=N\c2c(O)c(S(=O)(=O)O)cc3cc(S(=O)(=O)[O-])ccc23)c(C)c1.[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?