CC(C)[C@H](NC(=O)N1c2ccccc2NC(=O)[C@@H]1C(C)C)C(=O)N[C@H](C(=O)O)c1ccccc1
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?