O=C(NCCO)C(F)(F)C(F)(F)C(F)(F)OC(F)(C(=O)NCCO)C(F)(F)F
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?