COc1ccc(-n2nc(C(=O)Nc3cc(OC)c(OC)c(OC)c3)c(=O)n(C)c2=O)cc1
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?