NC(=O)c1c(NC(=O)CSc2nc3c(c(C(F)(F)F)n2)CCc2ccccc2-3)sc2c1CCCC2
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?