CCN1C(NCc2ccc(OC)cc2)=N[C@@H](CCc2ccccc2)[C@H](C(=O)NCc2ccc(OC)cc2)[C@H]1C
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?