CC(C)c1ccc(Nc2nc3c(S(=O)(=O)c4ccc(Br)cc4)nnn3c3ccsc23)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?