Cc1ccc(N2CC3=C(C2=O)C(c2ccccc2)NC(=O)N3C)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?