CCOC(=O)C1=C(C)OC(N)=C(C#N)C1c1cc2c(cc1[N+](=O)[O-])OCO2
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?