CC(C)(C)C1=CC(C)(n2[nH]c(=O)n(-c3ccccc3)c2=O)C=C(C(C)(C)C)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?