Cn1nnnc1SCC1=C(C(=O)[O-])N2C(=O)C(NC(=O)C(OC=O)c3ccccc3)C2SC1.[Na+]
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?