CCOC(=O)c1c(NC(=O)C2c3ccccc3Oc3ccccc32)sc(C)c1CC
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?