O=C(Nc1ccc(Cl)c(Cl)c1)C(=O)C(C(=O)c1ccccc1F)C1OC(=O)c2ccccc21
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?