Cc1ccc(NC(=O)CN(C)C(=O)COc2c(Cl)cc(Cl)c3ccc(C)nc23)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?