CC(C)[C@H](Nc1ccc(S(=O)(=O)N2CCOCC2)cc1[N+](=O)[O-])C(=O)OCC(=O)N(C(C)C)C(C)C
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?