O=C1CC(Nc2ccc(N3CCOCC3)cc2)C(=O)N1c1cccc(C(F)(F)F)c1
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?