CCN(CC(=O)Nc1cccc(C(C)=O)c1)S(=O)(=O)c1ccc(C)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?