CCC(=O)N1CCc2cc(Br)cc(S(=O)(=O)N3CCC(C(=O)Nc4ccccc4F)CC3)c21
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?