COc1ccc(C2(O)CCN(CC(=O)Nc3nc(-c4ccccc4)cs3)CC2)cc1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?