Cc1c(C(=O)Nc2ccccc2)sc2nc(-c3cc4ccccc4oc3=O)[nH]c(=O)c12
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?