[N-]=[N+]=NC(c1cn(C2CC(O)C(CO)O2)c(=O)[nH]c1=O)C(I)I
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?