CC(C)NC(=O)Nc1ccc2c(c1)C(=O)N([C@H](C)CO)C[C@H](C)[C@@H](CN(C)S(C)(=O)=O)O2
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?