CCOc1ccc(NC(=O)CSc2nc(-c3cccs3)cc(C(F)(F)F)n2)c([N+](=O)[O-])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?