COC(=O)c1c(NC(=O)CS(=O)(=O)c2ccc(C)cc2)sc2c1CCCCC2
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?