O=C(C/N=C(\CN(c1ccccc1)c1ccccc1)Oc1c(Cl)cc(Cl)cc1Cl)N1c2ccccc2Sc2ccccc21
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?