COC(=O)C1=C(N)Oc2cc(C)nc(O)c2C1c1cc(OC)c(OC)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?