Cc1ccc(-c2cc(=S)n(-c3ccccc3)c3[nH]c(=S)n(-c4ccccc4)c(=N)c23)cc1
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?