COc1cccc(-c2cc(C(F)(F)F)n3nc(C(=O)Nc4c(C)n(C)n(-c5ccccc5)c4=O)cc3n2)c1
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?