COc1ccc(NC(=O)Cn2c(=O)n(Cc3nc(-c4ccccc4)no3)c(=O)c3cc4c(cc32)OCO4)cc1Cl
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?