CCOc1ccc2nc(N3C(=O)/C(=C/c4ccc(Cl)cc4)NC3=S)sc2c1
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?