COC(=O)N/N=C(\C)C(CN1CCOCC1)C(c1ccccc1)c1cc2ccccc2oc1=O.Cl
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?