C[C@H](N)C(=O)N[C@H](C(=O)N1CCC[C@H]1C(=O)OCc1ccccc1)C1CCCCC1.O=C(O)C(F)(F)F
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?