CN(CC(=O)Nc1ccc(Cl)c(C(F)(F)F)c1)C(=O)CCCc1nc(O)c2ccccc2n1
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?