CCOC(=O)C1=CC[C@@H](c2ccccc2)N(S(=O)(=O)c2ccc(C)cc2)[C@H]1c1cccc(OC)c1
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?