Cc1ccc(Cl)cc1NC(=O)C1CCN(c2nnc(C)c3c(C)n(-c4ccccc4)nc23)CC1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?