COC(=O)C1=C(O)/C(=C\c2ccc(CNC(=O)C(=O)Nc3ccc(C)c(C)c3)o2)N=C1C
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?