CCOC(=O)c1c(NC(=O)CCS(=O)(=O)c2ccccc2)sc2c1CC(C)(C)NC2(C)C
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?