CCN1C(=O)C2C(C1=O)N1C(c3cccs3)C3C(=O)N(CC)C(=O)C3N1C2c1cccs1
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?