O=C(/C=C/c1ccc(F)cc1)NC(=S)NNC(=O)[C@H]1C[C@@H]1c1ccccc1
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?