CCC(C)C(NC(=O)OCc1ccccc1)C(=O)NC(Cc1ccc(O)cc1)C(=O)OC
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?