CSCCC(NS(=O)(=O)c1ccc(Cl)cc1)C(=O)OCC(=O)c1c(C)[nH]c2ccccc12
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?