CCN1C(=O)C2C(C1=O)N1C(c3ccccc3)C3C(=O)N(CC)C(=O)C3N1C2c1ccccc1
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?