Cc1cc(C)nc(NS(=O)(=O)c2ccc(Nc3c4ccc(Cl)cc4nc4c(C(=O)NCCN(C)C)cccc34)cc2)n1
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?