CC(/C=C1\SC(=S)N(CCCC(=O)Nc2ccc(C(=O)O)cc2)C1=O)=C\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?