COc1ccc(C(CNS(=O)(=O)c2cccc(F)c2)N2CCCC2)cc1.Cl
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?