COCCN(CC(=O)Nc1cccc(C)c1C)C(=O)c1cc2ccccc2cc1OC
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?