CCCC(=O)C1=C(N(C)c2ccccc2)CC(C)(C)C(C(=O)OC)C1=O
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?