CC(C)CC(NC(=O)C1CCCN1C(=O)[C@@H](C)NC(=O)OCc1ccccc1)C(=O)NCC(N)=O
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?