COc1ccc(-c2c3c(nc4sc(C(=O)Nc5ccc(F)cc5)c(N)c24)CC(C)(C)CC3=O)cc1
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?