COC(=O)c1cc(NS(=O)(=O)c2ccc(N3CCC(C)CC3)c([N+](=O)[O-])c2)cc(C(=O)OC)c1
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?