CCN(Cc1cc(=O)n2cc(Cl)c(C)c(Cl)c2n1)Cc1nc(O)c2ccccc2n1
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?