Cn1c(=O)n(C)c2cc(/C=C3/NC(=O)N(Cc4ccccc4)C3=O)ccc21
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?