COc1ccc(C2=NOC3(CC(=O)N(c4ccc(C)cc4)C3=O)C2)c(OC)c1
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?