CCN(CC)S(=O)(=O)c1ccc(NC(=O)COC(=O)c2cc(S(=O)(=O)Nc3ccc(OC)cc3)ccc2O)cc1
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?