CCOc1ccc(N2C(=O)CC(N3CCN(c4ccc(C(=O)c5ccncc5)cc4)CC3)C2=O)cc1
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?