Cc1ccc2c(=O)cc(C(=O)Nc3ccc(S(=O)(=O)Nc4nc(C)cc(C)n4)cc3)oc2c1
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?