CCCCNC(=O)c1ccc2c(c1)NC(=O)C(CS(=O)(=O)Cc1ccc(F)cc1Cl)N2
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?