Cc1ccc(S(=O)(=O)N[C@H]2COC(=O)[C@@H](Cc3ccccc3)NC(=O)[C@@H](C)COC(=O)C/C=C\[C@@H]2C)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?