COCC(C)n1c(C)cc(C(=O)COC(=O)CNC2=NS(=O)(=O)c3ccccc32)c1C
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?