CC(=O)c1cccc(NC(=O)C(=O)C(C2OC(=O)c3ccccc32)[N+](=O)[O-])c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?