Cn1c(=O)c2nc(CNc3ccc(C(=O)O)cc3)[nH]c2n(C)c1=O
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?