O=C(COC(=O)c1ccc(F)cc1F)Nc1cc(S(=O)(=O)N2CCOCC2)ccc1Cl
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?