N#Cc1cccc(NC(=O)N2CC[C@@]3(CCCN(C(=O)c4cc(C(F)(F)F)cc(C(F)(F)F)c4)C3)C2)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?