CCOc1ccc(N(CC(=O)Nc2ccccc2CC)S(=O)(=O)c2c(C)[nH]c(=O)[nH]c2=O)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?