CCOc1ccccc1/N=N/C1C(=O)N(C(=O)CC(=O)Nc2ccccc2OC)N=C1C
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?