CCN1C(=O)[C@H]2[C@@H](C1=O)[C@@H](c1ccc(OC)cc1)N1C(=O)CN(CCOC)C(=O)[C@@]21Cc1ccccc1
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?