CCOc1ccccc1N1CC(C(=O)NNC(=O)c2cc(OC)c(OC)c(OC)c2)CC1=O
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?