COc1ccc2c(c1)O[C@@H](c1cccc(C(F)(F)F)c1)[C@H](OC(=O)Nc1ccc(OC(F)F)cc1)C2=O
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?