Cc1cccc(CN2CCN(C(=O)CN(C)C(C)C(=O)Nc3ccc(C(N)=O)cc3)CC2)c1
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?