S=C1N(c2ccc(Cl)cc2)C2=C(/N=N/c3ccccc3)C(=Nc3ccccc3S2)N1c1ccccn1
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?