CCN(CC)C(=O)c1ccc(NC(=O)Cn2nc(-c3ccc(C)cc3)c3ccccc3c2=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?