O=C(O)c1c2c(nc3ccc(S(=O)(=O)N4CCC(C(=O)NCc5ccc(Cl)cc5)CC4)cc13)CCCC2
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?