Cc1cccc(N2CCN(C(=O)C(NS(=O)(=O)c3cccs3)c3ccccc3)CC2)c1C
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?