COc1ccc(NC(=O)Nc2ccc3nc(-c4ccco4)c(-c4ccco4)nc3c2)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?