O=C(Nc1ccc(C(F)(F)F)cc1)c1cccn(Cc2ccc3c(c2)OC(F)(F)O3)c1=O
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?