CN1CCc2nc(SCC(=O)Nc3ccc(OC(F)(F)F)cc3)c(C#N)c(-c3cccs3)c2C1
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?