COC(=O)c1ccc(CC2(C)C(=O)Nc3ccc(-c4cccc(C(F)(F)F)c4)cc32)o1
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?