COc1ccc(-c2noc(N3CCCC(C(=O)Nc4cc(F)ccc4F)C3)n2)cc1
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?