CCN1C(=O)/C(=C\c2ccc(-c3ccc([N+](=O)[O-])cc3OC)o2)S/C1=N\c1cccc(C(=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?