COC(=O)C(CCSC)NC(=O)CSc1nnc(COc2ccc(Cl)cc2)n1-c1ccccc1
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?