COc1ccc2c(c1)[n+]([O-])c(C(=O)C/C(=N\NC(=O)C[N+](C)(C)C)C(=O)Nc1cc(Cl)ccc1Cl)c(C)[n+]2[O-].[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?