O=C(CN1C(=O)C2(SCC(=O)N2c2ccc(F)c(F)c2)c2ccccc21)Nc1cccc(Cl)c1
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?