CCOC(=O)c1c(CSc2cccs2)n(C)c2cc(Br)c(O)c(CN(C)C)c12.Cl
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?