CCN(CC(=O)NC1CCS(=O)(=O)C1)Cc1nc(O)c2cc(Br)cc(Br)c2n1
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?