CCN1C(=O)C(CC(=O)N2CCN(C(c3ccccc3)c3ccccc3)CC2)N(CC)C1=O
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?