CC(C)c1ccccc1NC(=O)COC(=O)c1ccc(Cl)c(S(=O)(=O)N2CCCCCC2)c1
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?