CC(=O)N1CCOc2cc(S(=O)(=O)Nc3cccc(C(F)(F)F)c3)c(Cl)cc21
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?