NS(=O)(=O)c1ccc(N2C(=O)C(O)=C(C(=O)c3ccccc3)C2c2ccc(Cl)cc2)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?