CC(=O)OC1=CC2(OC(C)=O)CC(C)(C)C1C1C(=O)C=CC(=O)C12
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?