Cc1ccc2c(=O)cc(C(=O)Nc3ccc(S(=O)(=O)N4CCCCCC4)cc3)oc2c1
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?