CCOC(=O)C1=C(C)N(Cc2ccccc2)C2(O)C(OC)CC(=O)C3C(=O)N(c4ccccc4)C(=O)C132
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?