CCn1nc(C)c(NC(=O)CCCSc2nc(-c3ccco3)cc(C(F)(F)F)n2)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?