CCOC(=O)c1cc(C)n(CC2CCC(C(=O)Nc3ccc(C(C)=O)cc3)CC2)c1C
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?