COc1ccc(-c2ccc(O[C@@H]3OC(C)(C)[C@H](OC)[C@@H](O)[C@H]3O)cc2C(=O)NCCc2ccccc2)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?