CC(C)COc1ccc(-c2nn(-c3ccccc3)cc2/C=C2/SC(=S)N(CC(=O)O)C2=O)cc1
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?