Cc1ccc(NC(=O)CSc2nc(-c3cccs3)nc3cc(=O)[nH]n23)cc1C
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?