Cc1cccc2c(N)c3cccc(C(=O)NCC[N+](C)(C)Cc4ccc(S(C)(=O)=O)cc4)c3nc12.[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?