C/N=C1\SC(CC(=O)Nc2ccc(F)cc2F)C(=O)N1/N=C/c1ccc(OC(F)F)c(OC)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?