CCOC(=O)c1cnc(SC2CC(=O)N(c3ccc(OC)c(OC)c3)C2=O)nc1N
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?