C[C@@H](CO)N1C[C@@H](C)[C@@H](CN(C)S(=O)(=O)c2ccccc2)Oc2ccc(NS(C)(=O)=O)cc2C1=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?