O=C(Nc1ccc(F)c(Cl)c1)c1cc(S(=O)(=O)N2CCc3ccccc3C2)ccc1F
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?