Cn1c(O)c(C(c2ccncc2)c2c(O)n(C)c(=S)n(C)c2=O)c(=O)n(C)c1=S
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?