O=C(C1=C[C@H](c2csc3ccccc23)C[C@H](OCc2ccc(CO)cc2)O1)N1CCN(Cc2ccc3c(c2)OCO3)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?