CNC(=O)c1cc(NC(=O)CCn2nc(-c3ccccc3)c3ccccc3c2=O)ccc1OC
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?