CC1CC(C)C(=O)C(C(CC2CC(=O)NC(=O)C2)OC(=O)CC(=O)c2ccccc2)C1
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?