COC(=O)[C@H](Cc1c[nH]c2ccccc12)n1cc(-c2cc(C(=O)N3CCNCC3)cc(-c3cn([C@@H](CC(C)C)C(=O)O)nn3)c2)nn1.Cl
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?