N=c1[nH]cnc2nn([C@H]3O[C@@H](CO)[C@@H](O)[C@H]3O)nc12
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?