COS(=O)(=O)[O-].C[n+]1c2ccccc2c(/C=N\NS(=O)(=O)c2ccc(Cl)cc2)c2ccccc21
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?