CS(=O)(=O)Nc1cccc(NC(=O)c2ccc(-c3ccc(F)c(F)c3)c3ccoc23)c1
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?