C=CCn1c(=O)n(C2OC(CO)C(O)C2O)c2nc(N)[nH]c(=O)c21
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?