CC(C)(C)c1ccc(S(=O)(=O)N2CCN(CC(=O)N3CC(=O)Nc4ccccc43)CC2)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?