Cc1c(NS(=O)(=O)c2cc(C(=O)N(C)Cc3ccccc3)ccc2Cl)c(=O)n(-c2ccccc2)n1C
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?