CCN(CC(=O)Nc1ccc(NC(C)=O)cc1)C(=O)c1nnc(O)c2ccccc12
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?