O=C(CCC1N=C2c3ccccc3N=C(SCc3ccc(Cl)cc3)N2C1=O)N1CCN(c2ccccc2)CC1
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?