Cc1ccc(C(C)C)c(OCc2n[n+](CC(=O)c3ccc(Cl)cc3)c3n2CCCCC3)c1.[Br-]
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?