COC(=O)C1=C2N(Cc3ccccc3)C(C)=C(C(=O)OC)C(c3ccccc3)N2C(=O)[C@](O)(C(=O)OC)C1
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?