CN(C)CCCN1c2ccc([N+](=O)[O-])cc2CCc2cc([N+](=O)[O-])ccc21.O=C(O)C(=O)O
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?