COc1ccc(/C=C2\C(=O)NC(=O)N(c3ccccc3)C2=O)cc1CN1C(=O)c2ccccc2C1=O
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?