CCNC(=O)COC(=O)C1C(C(=O)OCC)=C(C)N=C(C)/C1=C(/O)OCC
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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?