CCN(CC)c1ccc2nc3ccc(/N=N/c4c(O)ccc5ccccc45)cc3[n+](-c3ccccc3)c2c1.[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?