CCN(CC(=O)Nc1ccc2c(c1)OCCO2)C(=O)/C=C/c1cccc(OC)c1OC
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?