CC(=O)Nc1ccc(C2(c3ccc(NC(C)=O)cc3)C(=O)Nc3ccccc32)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?