Cc1ccc(NS(=O)(=O)c2ccc(C(=O)N3CCN(S(=O)(=O)c4ccccc4)CC3)cc2)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?