CC1(C(=O)NS(=O)(=O)C2CC2)CCN(C(=O)c2ccc(F)c(Cl)c2)C1
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?