CC(=O)c1ccc(N2C(=O)[C@H]3NN=C(C(=O)CCN4C(=O)c5ccccc5C4=O)[C@H]3C2=O)cc1
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?