CCn1cc2nc(SCC(=O)Nc3ccccc3C(F)(F)F)n(Cc3ccc(C)cc3)c(=O)c2n1
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?