O=C1C(=Cc2cn(-c3ccccc3)nc2-c2ccc(OCc3ccc(Cl)cc3)cc2)SC(=S)N1CCS(=O)(=O)O
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?