N#Cc1cc([N+](=O)[O-])ccc1NC(=O)/C(=N/N)C(C(=O)c1ccc(Cl)c(Cl)c1)C1OC(=O)c2ccccc21
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?