CC(OC(=O)Cn1[nH]c(=O)c2ccccc2c1=O)C(=O)Nc1ccccc1[N+](=O)[O-]
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?