O=C(Cc1csc(Nc2nc(S)nc3ccccc23)n1)N1CCN(c2cccc(C(F)(F)F)c2)CC1
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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?