Cc1ccc(S(=O)(=O)Nc2cccc(C(=O)NCC3(N4CCCCC4)CCCCC3)c2)cc1F
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?