O=C1C=CC(S(=O)(=O)C2=C/C(=C/Nc3ccc(Cl)cc3)C(=O)C=C2)=C/C1=C/Nc1ccc(Cl)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?