Cn1c(=O)c(=O)n(C)c2cc(N3CCOCC3)c(NS(=O)(=O)c3ccc([N+](=O)[O-])cc3)cc21
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?