CCOC(=O)c1sc(NC(=O)CSc2nc3c(c(-c4ccc(OC)cc4)c2C#N)CCCC3)c(C#N)c1C
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?