COCCN1C(=S)N[C@@H](c2cccc(F)c2)C(C(=O)OC)=C1C
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?