CCOC(=O)c1cc(NC(=O)c2ccc(OC)cc2)c(=O)n2c1oc1ccc(Cl)cc12
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?