Cn1cc(/C=C(\NC(=O)c2ccccc2)C(=O)N2CCOCC2)c2ccccc21
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?