Cn1c(=O)oc2cc(S(=O)(=O)N3CCC(C(=O)Nc4ccc(F)c(Cl)c4)CC3)ccc21
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?