CC1Cc2cc(C(=O)C3=C(O)C(=O)N(Cc4ccncc4)C3c3ccc(N(C)C)cc3)ccc2O1
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?