Cc1ccc(N2C(=O)N(CC(=O)Nc3ccccc3C)C(=O)C2C)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?