Cc1cc2nc(-c3ccc(SCC(=O)Nc4ccc(S(=O)(=O)NC5CC5)cc4)nc3)[nH]c2cc1C
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?