Cc1c(C(=O)NCc2ccc(Cl)cc2)sc2nc3n(c(=O)c12)CCC3
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?