Cc1ccc(C(=O)C2C(c3cccs3)NC(=O)NC2(O)C(F)(F)F)cc1
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?