Cc1ccc(C(=O)COc2cc(O)c3c(=O)cc(-c4ccccc4)oc3c2)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?