COCCN1C(=O)N[C@@H](c2cccc(C(F)(F)F)c2)[C@H](C(C)=O)[C@H]1C
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?