CC(C(c1ccc2c(c1)OCO2)c1c(N)n(C)c(=O)n(C)c1=O)[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?