N#Cc1c(-c2ccco2)c2c(n(C3OC(CO)C(O)C(O)C3O)c1=S)CCCC2
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?