Cc1nnc(NC(=O)CSc2nc3c([nH]c4ccccc43)c(=O)n2-c2cccc(Cl)c2)s1
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?