Cc1nn(Cc2ccc(Cl)cc2)c(C)c1NC(=O)c1cc(-c2ccc3c(c2)OCO3)on1
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?