CC(C)Cn1cc(NC(=O)N2CCN(c3cccc(Cl)c3)CC2)c2ccccc2c1=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 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?