Cc1nn(C)c(Cl)c1CN1CCCC(C(=O)Nc2ccc(-c3cscn3)cc2)C1
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?