C/C=C1\COC(C(=O)NCc2ccncc2)(C(F)(F)F)C=C1C=C1CCCCC1
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?