CC(/C=C1\SC(=S)N(NC(=O)c2ccc(O)cc2)C1=O)=C\c1ccccc1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?