Cc1ccc2sc(NC(=O)c3cccc(N4C(=O)CCC4=O)c3)nc2c1C
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?