CC(C)C1(O)C(=O)N(c2c(F)c(F)c(F)c(F)c2F)C(=S)N1CCSc1ccccc1
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?