Cc1ccc2nc(-c3ccc(Cl)c(NC(=O)COc4ccc(C(C)C)cc4)c3)oc2c1
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?