Cc1ccc(NC(=O)c2nc(S(C)(=O)=O)ncc2N(Cc2ccco2)Cc2ccccc2F)c(C)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?