COc1ccc(CC(=O)OCC(=O)Nc2c(C)n(C)n(-c3ccccc3)c2=O)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?