Cc1ccc(N2C(=O)/C(=C\Nc3ccccc3-c3nnc(S)nc3O)c3ccccc3C2=O)cc1C
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?