O=C1C2C(C(=O)N1CCN1CCN(Cc3ccc([N+](=O)[O-])cc3)CC1)[C@H]1C=C[C@@H]2C1
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?