CC(=O)Nc1ccc(S(=O)(=O)N[C@@H](C)C(=O)OCC(=O)NC2CCCC2)cc1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?