CC(=O)Nc1ccc(NC(=O)C(C)Sc2n[nH]c(-c3ccc(C)cc3)n2)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?