O=c1[nH]c(=O)n(C2CC(O)C(CO)O2)cc1C(F)(C(F)(F)F)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?