O=C1N[C@@H](Cc2cn(S(=O)(=O)c3ccccc3)c3ccccc23)C(=O)N[C@H]1Cc1ccccc1
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?