CC(C)C1Cc2c(sc3[nH]c(=S)n(Cc4ccccc4)c(=O)c23)CO1
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?