CC(OC(=O)C(NC(=O)c1ccco1)C(C)C)C(=O)Nc1ncc(Cl)cc1Cl
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?