O=C(C[n+]1cccc(CNC(=O)c2ccc(OC(F)F)cc2)c1)Nc1cccc(C(F)(F)F)c1.[Cl-]
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?