CCN=C(S)N(Cc1ccc2c(c1)OCO2)C1CC(=O)N(c2ccc(OC)cc2)C1=O
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?