CCN(CC)C(=O)Cn1cc(S(=O)(=O)CC(=O)Nc2ccc(C(N)=O)cc2)c2ccccc21
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?