Cc1ccc(Nc2nc(C)c(C(/C=C/c3ccc4c(c3)OCO4)=N/Nc3ccc([N+](=O)[O-])cc3[N+](=O)[O-])s2)c([N+](=O)[O-])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?