CC[C@@]12C(=O)N(c3ccccc3)C(=O)N1[C@H](c1cccc(C)c1)[C@@H]1C(=O)N(Cc3ccccc3)C(=O)[C@@H]12
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?