COC(=O)C1=C(C)N(NC(N)=O)C2(N)N(NC(N)=O)C(C)=C(C(=O)OC)C12C(=O)OC
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?