CC1(C)C(=O)OC(C(=O)c2ccc(C(C)(C)C)cc2)C(C)(C)C1=O
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?