Cc1c(OCC(=O)NC(Cc2ccc(Cl)cc2)C(=O)O)ccc2c1oc(=O)c1ccccc12
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?