C=C1c2c(n(S(=O)(=O)c3ccccc3)c3ccccc23)[C@@]2(C(=O)OC)CC3C=CC2N1C3
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?