Cc1ccc(NC(=O)Cn2c(O)c(N=NC(=O)c3cc4ccccc4cc3O)c3ccccc32)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?